I have been using them for about six months and they are pretty good for my level.
Not sure what your level is Prof?!
Anyway, I went to Dawkes and bought myself some Alexander Superial 2.5's and Gonzalez Jazz Local 627 2.5's, both for the tenor. What did I think of the Gonzalez? Well, they are quite nice, a fair bit darker than the Superials on my Jumbo Jazz mpc, seem to be quite consistent across the 5 reeds that I bought but I still prefer the Superials by a long way, they seem much more to produce my sound. There's nothing wrong with the sound of the Gonzalez if you want a slightly darker tone.
My main problem with them is that they were quite hard work - it feels like they are closer to a Van Doren 2.5 than a Rico 2.5, and Van Dorens do tend to come up a bit harder. I think if you are used to a Rico 2.5 you might be better off with a 2 in the Gonzalez, although on the box it says they grade their strengths in quarters, so maybe a 2.25 if you can find them.
All in all, not a bad reed, but not one I'd use again, especially as I have got some Superials after some time away from them, and they really do suit me and my mouthpiece. If anyone want to try a Gonzalez, I'll send you one, they are still pretty clean and relatively unused!