General: 

Merge Gaming Network is relatively new on the online poker market, but it's quite clear it is determined to succeed, offering massive promotions, quick withdrawals and great software. Residing on the increasingly popular Merge Gaming network also allows them to accommodate U.S. players, a great advantage, and something helping them grow quickly.
                 US PLAYERS ACCEPTED

Software:

The software is provided by the Merge Network which is a new network with very innovative software. This software has so many advanced features such as rabbit hunting, fold and show (one of both cards) and much more. All the basic features are in place such as note taking, hand histories, table stats from lobby

Game Variety: 

Merge Gaming Network offers all major variations of poker: Holdem, Omaha, Omaha Hi/Lo, 7 Card Stud, 7 Card Stud Hi/Lo, Razz, Ace to Five Triple Draw, Deuce to Seven Triple Draw, Badugi, 5 Card Stud and 5 Card Draw. They also offer skill games such as blackjack and backgammon.


Player Traffic:

The Ring game traffic is still kind of low with 800-900 players during American peak hours: Merge Gaming Network is the 18th  most popular online poker site for ring game

While there are different software packages available with somewhat different features, they don't make a huge difference to me unless they simply don't work well.  What's more important is the individual site operators.  In that regard, one Merge site that I've had positive experiences with in terms of things like processing my withdrawals quicker than average and answereing my occasional questions promptly is PDC, formerly Poker.com.