No, I have never owned a Phoenix. But I worked on a lot of them because they didn't work. I have no doubt that many, maybe most, are OK and will work well for at least a while. But they are made of soft alloy, springs are low quality, and the guns in general are of low price but also of low value.
I would say that if you buy one, make sure the dealer will agree to replace (not repair) it or give full price on another make of gun if it is not satisfactory (do not depend on the factory warranty). Then try it out. Most problems will show up in 50 rounds; if it goes 100 with no problems, it is probably good enough for sporting purposes.