Ok, first off I apologize if this information has more or less been given by various posters, but I wanted to go ahead and share my experience over the past couple of days.
After licking my wounds and lamenting the "money" I have still sitting on my Stars account, I decided to look for some other options. Ultimately, I decided to go with Carbon Poker as I think Merge is the best option for US players now, and Carbon is the flagship skin for that network. I signed up for an account through an affiliate( affiliate link deleted ) and used the code [del] for a 200% deposit bonus ( which takes an eternity to clear, but hey 35% rakeback is pretty sweet so I won't complain ). I had some email correspondence with support and I will say that they are very quick with responses and also very helpful. Not once did I get some lame boilerplate response that didn't even answer my question.
The trick to playing on Carbon is actually funding your account. They list Visa as an option, but I have two Visa cards that were both declined. UseMyWallet is another option, but you can't just sign up for an account. You need someone to issue you an invite. Fortunately, Carbon Poker support can do exactly that. I used their live support option, and the support person I dealt with was very helpful. I received the email right away, used that to create a QuickTender account ( apparently QT and UMW are interchangeable ), did an instant deposit via my bank account, and had my Carbon Poker account funded within 2 minutes. Very simple process.
As for the actual play on Carbon, I don't have any major complaints with the software. It needs some improvements, but there is nothing that's so bad that I would say it drastically impacts my ability to play. I've been 6-tabling on a laptop with no problems.
With respect to the quality of the players, I can't really speak much on that. I was playing 5/10 and 10/20 6max on Stars before the Dept of Injustice gave us all the finger, and I'm only playing 25NL on Carbon because I just didn't feel comfortable depositing more than $300. My winrate is something like 20bb/100 over 2500 hands, if that means anything.
In terms of withdrawing, from what I've read on 2+2 people don't seem to be having any problems. You'll get the occasional bounced check or delayed withdrawal to your UMW account, but we've been dealing with crap like that for years.
If anyone has any questions, shoot me a PM or just ask them in this thread and I'll try to help out with whatever I can. I just want people to know that there are still options out there that are legitimate, but obviously we're in a play at your own risk environment. I would not deposit money on a site right now unless you are able to lose it without losing a second of sleep. It's not worth it.