The small pixel size is a curse/blessing. As with all CCDs you should try to optimize the focal length/pixel size combination to yield pixels that cover about 2 arcseconds of sky. With the ST-7 and its 9 micron square pixels, that implies a focal lenght of about 900 mm.
I used an Orion focal reducer with my 8" SCT to get an EFL of some 1400 mm, which yields pixels of 1.3 arcseconds. Typically for my asteroid work I use the 2x2 binning to get 2.6 arcsecond pixels. The advantage is that the larger pixels are more sensitive and permit deeper images for a given exposure time. The resulting FOV at 1400 mm is some 17 x 11 arcmin. The image file size for the 2x2 binned shots is about 100k (compressed).
Beginning in the Fall of 1997 I started using a MaxField .33 focal reducer from Optec that produces an EFL of some 660 mm, which implies 2.7 arcsecond pixels at the highest resolution. It also means a FOV of some 35x23 arcmin. The file sizes, however, jump to 400k (compressed) and download times are proportionally longer. The much larger field coverage (which raises the probability of discovering a new asteroid considerably) is worth the extra cost.
I didn't know what I was ordering and I got the anti-blooming option. It is true that I'm not bothered with those ugly blooming streaks from saturated regions, but I also suffer a reported 30% decrease in sensitivity. Given that most of my images have been of asteroid fields with hardly ever a star bright enough to saturate (and bloom), I plan to have the chip changed in the Summer of 1998.
All in all, I give the ST-7 high marks.