Computer Analysis

How good is the computer analysis here in chess.com? Can anyone give me some details on it? Perhaps some pros and cons compared to others? Also, is it worth it compared to free ones that can be found online? Is it more helpful than relying on forum posters to help analyze games?

Some other questions I have on improving my play:

~ Should I anaylize every game I play?

~ Should I vary the types of games I play? (10 min, 30 min, 15/10)

~ What is a good black reply for 1.e4 from white??

Any other tips on how to start analyzing my games properly and efficiently would be greatly appreciated! So far these forums have been great. Also, I am debating on which of the three premium membership levels to sign up for. It seems some of the higher tier stuff is free to access on other sites! But I want to at least get the gold membership.

Thanks as always!!!

no, no, 1..... d5

sftac