The pts mustang has been a great little plane for me. I found it easy to fly, but some have not. Guess its like buying a car. Some will like it and others will not. If you rely on mixed reviews, I doubt you would ever buy anything again. If you have read the entire thread, you know what has been said, both good and bad, about the mustang. What it boils down to is, if its what you want, go for it. You did say you would get help from an instructor. That will be of great help and will add to your enjoyment and keep you involved in the hobby. The radio that comes with the rtf is alot better than those you get with other rtf's. The engine was simple to tune and has flown the plane well for me. The sim helped alot. Spend alot of time on it to get the feel of going away and towards you control. You may develop some bad habits until you get with an instructor, but a good instructor will correct you pretty quick. Then you can practice on the sim what you learned with your instructor. your willingness to read the mustang thread put you ahead of the game so you know what to look for and the tips to prevent trouble.
Whatever you decide to do, enjoy and get out there and fly.