We have a micro in a small park in the middle of town. The description plainly states "The coordinates will be "iffy". There is a lot of interference from the buildings so it may be tough to get a good reading. Have fun!!!!"
There have been lots of logs that include "updated" or "better" coordinates than the ones posted. Most by cachers with fewer than 10 finds. I have explained to each one of them that due to the very tall buildings surrounding the little park, the slice of sky is so small that you will be lucky to get much help from the GPSr. The hint is of a variety that if you just spend a little time looking in the general area you are pointed to, you WILL eventually get to the right spot. Its just a process of elimination.
Still, I have been chastised more than once about my "bad" coordinates and was told by one cacher once that the posted coords were so far off, I needed to either fix them or archive the cache.