Im pretty sure all the previous ratings are made by the programmer of this app .
The good: easy to keep scores and fun , able to broadcast scores ( i have not tried this yet) able to email stats .
Bad: cant change who is serving once the match is already in progress , this is a problem if after a tie breaker the players mess up the order or spin the racket like some players do , forcing you the end the match and start another , it is also missing options like a serve that forces an error , instead youbhave to inaccuratly report an ace or a unforced error which is not right or an overhead forced .
A lot of tge detailed stats are on the report (missed returns , etc...) but you have no access to , if there is a way to do everything i wrote here then ease correct me and ill change my rating to 5 stars