Southwest Flight Center has been nothing less than amazing. All of the instructors I've met seem to genuinely love teaching (instead of the all too common time builders). The people working the front desk have always been very friendly and prompt (minor maintenance issues are resolved quickly). Their aircraft are clean, well taken care of, and always seem to be available. The prices are cheaper than or comparable to anything else in the area for equal equipment.
In reference to Brent S. experience: I've continued to get recurrent training here after getting my PPL with them, and have never had an issue checking out an aircraft while doing so. If that was previously the culture here, it certainly isn't now.