I like mostly everything about this application except for some of the interface being really clunky to use sometimes with things we're used to seeing elsewhere in other applications (for example - how you navigate menus).
Other than not liking our experience as much as others would have liked us having something else be it their business model or pricing structure, there's nothing so far that has been problematic when using Tax Adda at all! We've found most aspects easy enough if given time/practice but are also able to quickly figure out those functions by just playing around a bit until they become somewhat comfortable. Being located away from any office allows me to work remotely during normal working hours which is great because I don't get home after my 8 hour day often times.