DislikedYes, I indeed love Thinkorswim...Their trading system NEVER go down once since I with them for past 6-8 years. and they save me alot on commission with tight spread.
I thought MBT has same reputation....Ignored
MBT NAV as a platform is not nice, ugly, but time-proven and steady
MT4 is a TRY and IMO a total failure and they take little care to offer at least the same service as on their home-grown platform
All in All I like them, because:
1) I get best spread
2) Instant execution
3) Best support ever
4) A feeling of belonging to a family
5) API to make everything you need yourself ( I am software engineer myself )
So currently positive things overweight negative, though I dont believe they will fix my mentioned problems anytime soon