Trained at STL a couple of years back for the CPL and IR, thought they were great. Minimum hassle, dead cheap (especially for the south east!), and I jumped through all the required hoops with minimum time and expense and first time passes all round. I'm not even sure if he's still there, but Eric Thurston is the man - he's a pedantic old sod but he's got a damn near magical reputation when it comes to IR first-time-pass strike rate.
It is possibly not the right place for people who need to have things explained to them 10 times over, and have an instructor bully them into self studying and generally hold their hand every step of the way, because that won't happen - but if you know what you want and how to go about getting it then it comes highly recommended.