hahah, quite funny.
See point 11.
They are decent.
Now also providing free api + data. python client is good ( atleast for v1). In comparison, for ex, 5Paisa has horrific api and even rms is buggy.
Issues that i faced
1) Settlement delay - money in bank by 1200-1400. With Z i get it ( so far ) before 8 am. So plenty of time. Dont know if there is any broker that does this. Big issue for intraday traders.
2) Stability. They are fine most of the times, but still have had 3-4 problems in last year. Also more likely to get temporary error from api. Z in comparison has worked smoothly for me, but this could also have some luck to it.
3) Square off time. I prefer 5mins extra given by Z, but i guess most follow 1515 and this may not be an issue for many.
4) This depends on you, but i rather not keep too much money with smaller brokers. Z is much more profitable so lower risk.
For me, i am struggling to get another large broker that can work as well as Z for my use case. Really would like one to reduce outage risk. But so far angel/upstox dont seem to be ready yet based on other people's views. upstox does not even provide api. Had tried 5p - complete waste of time.