yes poker.com is a good site but to go as far as saying its great is way off.
its got good graphics and the smilies are pretty cool, theres loads of donkeys play there and if you can avoid the nasty dreaded river cards there or dont get donked on the river there you can easily make some decent winnings

but unlike other bigger sites there isnt a huge amount of BIG games.. no $1mil tourneys like at i-poker best they offer is a 50k freeroll i think... but still its a good site and is very user friendly