My first trainer was a Nexstar, and I liked the fact that the wing bolted on instead of using rubber bands. Every trainer I've owned and flown since that Nexstar - Easy Fly 40 ARF, Tower Trainer .40 MkII ARF, and now Solo Star .40 ARF, have all used rubber bands to secure the wing, and I like it that way.

As previously mentioned, those rubber bands are there to provide give and flexibility to the wing mounting system. Bolt on wings may look nicer, but they reduce the functionality of the trainer.

Virtually every veteran flight instructor and seasoned pilot I know has a trainer that uses a rubber banded wing rather than a bolt-on wing. Guys who know stick with rubber bands.