I've traded with CTG on and off for 3 years. Everytime I leave and come back I find new services and support free of charge. I definitely do recommend them over my previous prop firms (t3 and dimension). the rates are good and they have a few different nasdaq certified platforms available. They aren't perfect by any means. I've had issues with short requests, buying power adjustments, small account errors, etc. but they've always attended to my concerns in a timely fashion.
good group to trade with. their rates and customer service are really good and they have every execution platform out there. the sterling-eisgnal combo for $269/month is a great deal. they have a good short list (wedbush) but sometimes the stock takes a while to showup in the list after requesting a short. their training program is free for anyone with an account so that was a big added bonus
the primary difference between CTG and my previous firm is customer service. I feel a lot more comfortable knowing there is always somebody just a phone call away, unlike my previous firm which was a nightmare to deal with.