The Sport was a fun airplane to fly and gave me an intro into the glass panel world. Having said that, I was glad to get back into a Cherokee when the school bought the replacement trainer.
In my opinion, the PiperSport is a great little plane for an experienced pilot who will be gentle with it. They don't really belong in a training environment. They just aren't built to take fifty to a hundred student landings a day. Shortly after we started flying it, the nosewheel bracket cracked and it took 3 tries to get the replacement part. A couple months after that, the whole nosewheel snapped off on taxi to the runway. Our owner took it off line. He said he didn't feel comfortable putting his students in that plane. A couple weeks later, we got our Cherokee 140 to train in.
I'm glad I got a chance to fly one, but I'd be leary of taking one up that was in a rental/training situation.