Comments on Tamron 18-250?

I'm a bit more interested in the upcoming (announced but no release date) Tamron 28-300mm VR/OS/whatever Tamron calls it. My first lens was a Tamron 28-300mm and I currently have a Promaster (Tamron rebadge) 28-300mm for travel use. It's a really convenient lens for times that image quality aren't the utmost of concerns. Adding VR/OS to it will make it alot more usable at the long end and the range interests me more (I've never really been a wide shooter).