Scribophile

I've tried them all and Scribophile is without a doubt the best writing site I've encountered.

I've been with them as a member for many years and don't see myself as ever leaving. The site itself is easily navigable with its large and colorful prompts, all laid out in a logical and eye-appealing format.

I've met hundreds of dedicated and talented writers, editors, publishers, and agents there, many of them published, and just about all more than willing to help you along in your writing endeavors.

The monthly membership fee is more than reasonable and is even discounted for those comfortable with a longer term membership.

As for submitting your writing for review and analysis and reviewing the works of others, the process is a straightforward and simple one via the "Karma" point system. I've grown to like it and can always see my efforts on my profile page.

Highly recommended for both novice and experienced novel, short story, and flash fiction writers. There are also categories for those who prefer nonfiction and poetry.

In short, I've learned more on Scribophile than I ever did in any college writing class.

I've tried both Critique Circle Pro and Scribophile Pro.
Heres a few comments about the service for anyone interested in signing up.

1)Scribophile is free
2)Pro is worth it if you don't mind the critiquing.

Critiques:
You can post a piece of crap writing and they will tell you everything thats wrong with it. I got more feedback from Scribophile than from taking a $400.00 writing course from a community college. I'll say this much, the Professor was not engaged and the students sugarcoated the feedback. If I'am paying for a writing course and putting my work out there I want people to rip my content to shreds. They are all very nice on Scribophile minus a troll or two. Some of the reviews are harsh but I prefer harsh over sugarcoating.

Critique Circle Vs. Scribophile
If I picked between Scribophile and Critique Circle I would pick Scribophile. I've seen some professional editors give feedback on the site. This site won't promise you published work, it enhances the work and tells a writer where they need to improve. It's up to the writer after that point.

Karma:

I like the Karma point system. It makes me think twice before posting something impulsively. I also improved my own writing style be critiquing other peoples work. It's like a writing course without the Prof and it's cheaper. The people who have been complaining need to take a writing course with a mediocre Prof.

I see some areas where it could improve, it's a good service that makes even the Pro Members work hard. The critiques can range from poor to excellent, harsh to constructive. Go to the site with a thick skin. You won't be getting feedback from friends tip toeing around major plot holes. If you don't want to spend as much time critiquing this site might not be for you.

Joining Scribophile (Scrib) was one of the best decisions I ever made as a writer.
Other reviews here note the membership cost--$65 a year is very reasonable, especially since you can store as many works as you want with that price.
The karma system makes perfect sense, as with most writing groups one would need to read and critique 3-5 other people's works as part of the exchange to get their own critiqued. I personally found that karma didn't really matter, as I am a novel writer, so I would seek out other novels and critique them. Usually by the time I had read and critiqued 2-3 novels, I had plenty of karma to post my own work.
The beta spotlight makes things even easier, since if you create or join a group you can exchange without using karma towards the posting fee. You DO have to pay for premium for this advantage, but again, it's rather affordable, and there are a lot of philanthropic members who gift premium to people who are hard up.
The community as a whole is pretty great--the main forums can get a little intense, but on a site with writers I think that's to be expected. Groups are a great way to socialize with like minded people and avoid the general area if that's more your speed.
Also, there are policies in place to handle people who give poor critiques and don't follow the "pay it forward" mindset of the site. Some other reviews here criticize it, but in my experience, the moderators and owner do their best to be fair. It may seem a little harsh, but usually if you try to follow the rules you shouldn't have any problems.
The site is a lot to take in at first, and I think it could be improved with some site ambassadors who reach out to newcomers and help them learn the ropes of the site, maybe assist with or review their first couple of critiques.
Other than that, it's fantastic, and I highly recommend it.

I have been a member of Scribophile for several years. I received both great critiques and poor critiques (usually a new member). Still, I have made several friends on this site. I use both Scribophile to get a critique and then present the same information to my in-person critique group. It works out great.

Since I moved to a smaller town, I do not have an in person critique group, this is a great site. Critiquing others works is not drudgery and it helps me improve my own writing. Other writers, particularly some newbies enjoy my insights. Others have given me great insights into my own work.

The site can use some more prefessionality in it's critiquers. Checking spelling and grammar is good, but in rewrites, that is often thrown out. Sentence structures and information is changed. Reading previous chapters is helpful to understand what you are criticquing. I appreciate those that take the time to check my histoical references or adjectives.

Posting critiques is easy. Answering a few questions then copy and paste. I like Scribophile and hope critiquers take their suggestions more seriously since they are given karma points whitch are easy to accumulate. Karma points are a great way to get works read. I've had no problem acumulating points nor using them.

Hope to see more professional writers on here.