A few years back when I was a flight instructor, I was given a student new to our school who had just left Sierra Academy because of how much money he had spent. I can't remember the exact amount, but all he had was his private pilot's license and an instrument rating and he had spent over 40k. I went the part 61 route, so the price was a bit of a shock. I spent that amount on all licenses up through the ATP, and that included recreational flying as well.
So, I expected that since this guy went through a "structured" program, that he must be a pretty good stick. I mean, after all, look how much money he had just spent.
This guy couldn't fly his way out of a paper bag. His instrument skills were embarassing, especially for someone who had just taken a checkride weeks earlier. On top of the that, he had an attitude problem, making excuses for why he couldn't fly the airplane. I kept an open mind and flew with him again, but wasn't any better the next time. The guy just couldn't fly on instruments. His VFR skills weren't much better. He didn't like the plan I had for his progress, which included remedial instrument training, saying he already had his instrument rating and just wanted to work on his commercial multi. After going through a few instructors at our school, he finished up at Sheble's and last I heard he started instructing there.
Not to represent that all Sierra Academy students are this way...this was just one example...could have been just a bad apple of the lot, but who knows....makes me wonder how he got through a checkride...