I've had the T30's on for the last couple months. I have about 4300 miles on the front and about 3800 on the rear. They are holding up much better than any other tires I've tried. Tires I've used: Pirelli Angel GT, Michelin PR3, OEM Dunlop, Shinko Raven, Bridgestone BT023, BT021, BT016 and Conti Motion.
I keep coming back to Bridgstone and I think the T30 will be my go-to tire from now on. They are much cheaper than Michelin, Dunlop, Pirelli, Avon, Continental and Metzeler, but seem to give comparable or better mileage. The Shinkos and Conti Motion work fine and are cheap, but don't last; I had trouble reaching 4000 miles with either.
I like the handling just fine (I occasionally scrape a footpeg), I think they have a very neutral and confidence inspiring feel. I have not tried them in the rain; in general I avoid rain riding on my Versys, I use my KLR650 for that.
I'll know more about the T30 when I reach the end of their life.