I've flown STRETCH. I found them to be comfortable and enjoyed the flight. As for $25.00, that's about to become history, as it will require a Classic Plus purchase.
That said, I would much rather see a STRETCH product offered in a 2X2 configuration. That would make it even more comfortable.
I've also flown STRETCH on the E190. Given the choice, I'll take a 2X2 STRETCH anytime. It's probably a moot point, as I've heard nothing to indicate 2X2 coming to the Airbus fleet.