The "Plus" is my all time favorite bat. I have owned 3 of them and got a "+" as the return for the last one I broke a few years back.
At the time I was switching from playing USSSA to ASA so the "+" didn't get swung very often. I did like the feel and it seemed to hit well, but it definitely wasn't the same bat as the "Plus". With the new USSSA standards it really shouldn't have been anyway so my expectations weren't real high.
For what it's worth, I do think the "+" is a pretty underrated bat if you need the new stamp, especially for the price you can get them for.