I like execution on mt5 platform and a 50% bonus. I cannot tell you what will lure YOU in as I don't know your preferences. But in terms of something substantial (like service level), octa is a good choice.

The brand based on high quality.
There's no one thing that I like at Octa so it crosses everyhing else, the whole combination is what made a client.
Look from any angle, their services are top of the market, and negative sides are absolutely minimal. Like if you look at education, there's lessons and Space+.If you look at payments, no commissions.
If you look at platforms, MT4-5 and octratrader, and so on. So wherever you look, you see high quality, and this is why people actually choose Octa.