I was thinking about sending out a mid season letter something like this (not much detail though) We are about midway through the mowing season and we appreciate your business blah.blah . We just want to make sure we are providing the quality of service you expect. Please let us know if we are falling short in some areas and need to improve. Or there may be some extras services such as shrub trimming you may have a need for. Yada, yada, yada Is this a good or bad idea guys? Maybe put a referral discount in there also?