PokerStars
Played 73 hands in two sessions.
$5NL – 28 Hands -$5.12
$10NL – 45 Hands $7.30
My first shot at $10NL. I wanted to stick my nose in and see how it was. Clearly I didn’t do badly. 
Cooked off another stack at $5NL, but I don’t think the hand had any huge errors, I just ran into a better hand. Granted I didn’t give the villain much credit and he turned out to be a better player than I’m used to at $5NL.
$10NL was fun. Players were soft, but not too passive or too aggressive. Granted my sample size is so small as to be insignificant, but the player skill levels doesn’t seem to increase much $5NL to $10NL except the players seem to take the game a little more seriously.