I've visited all of the Texas resorts. The units vary from very old (70's) to new and the maintenance seems to vary equally from not-so-good to excellent.
Every location was pretty much as I expected and certainly nothing to wave a plus banner for. My biggest negative would be saless. These folks are hard sale all the way. Very misleading and generally just insulting.
Non-professional would be a gross understatement. Watch your back with these guys; they are of the shifty persuasion.
I'm an owner of Hilton's Grand Vacation Club since 2003 and they are are first class and professional in every instance.
I'm sure Silverleaf would be better if I didn't have a first class organization to use as a comparison. Ron (Alvarado, Texas)