I was going to get a Tamron 28-200 and read a lot of awful reviews on it dyxum. Maybe they just got bad copies? I was looking for a good walkaround for my Maxxum 4, it's my walkaround 35mm because it weighs next to nothing. I have the 18-270 hyperzoom for my Canon Digital Rebel and was impressed with it.
I haven't had any bad results with the Tamron 28-200. The "a little soft" comment comes from looking at the negs with a 25X loupe. 8x10 & 11x14 prints look fine. 16x20 prints might show a bit of the softness but I rarely enlarge 35mm to that size.