I can give you some personal experience as I just switched over to that firm. I have only been there a few months so I do not have that much exposure. I have been at 4 different prop firms in my 14 year trading career and most people on here are going to go off on all of them mostly because they are failed prop traders and they have to blame someone. I will just give you pros on why I went over. I got lower commissions. 30% lower and that made a difference fro me as I trade 75-125k a day. if you are a swing trader, commissions may not matter. I also trade pairs and T3 had the Iris pairs system and made me an offer on Buying Power that I couldn't refuse. If you don't trade pairs, this won't matter to you. You get access to T3 live etc. with them, but I just appreciate the attention I get when I have questions/issues etc. They are on the ball. I had issues with my last firm with getting responses, delayed information etc. Obviously there are only a handful of people who make it in prop, so do what you can to keep your costs down. Trading firms do not make the trader, but a bad trading firm will kill a trader imo. It's all about costs. Best of luck as this is a hard business