Purchased both large and small connectors for my hoodies. I use the large with my PAX era, and the small with disposables with square like tips. Works flawlessly every time!
It was great for concert use all my friends thought it was really cool.
The large adapter works very well with my Trustick (approx. size = Juul), but unfortunately, I have a Wi-Pod that is larger than that. It would be nice if there were an Extra Large Adapter.
Sherpa hoodie runs small, the XL is not very long, and tight in the sleeves in particular. Also the zipper should run further up the neck, the zipper when fully zipped up is still rather shallow on the chest.