I have one of these, I've done portraits and landscape images. It works great. I've had no trouble on my 7D with 12 fps shooting and VC. I usually use the 12 fps for HDR bracketing. Much better than the Canon 24-70 f2.8 L for sharpness, and just about everything else. Great price. Cant wait to see the 70-200 VC. I hope it keeps up with the quality.
I'll definitely be checking this one out. I got the Tamron 24-70mm and its great! I used it for a photoshoot the weekend before last, and it works a charm, and its tack sharp! I hope the 70-200 will combine the image quality of the previous tamron macro version, with the upgrades of VC and USD.