We have been using BGMU Fiber very consistently for several years at four different locations.  We have had nothing but consistent internet each and every day without lagging issues or drops in performance.  BGMU has done a fantastic job with alerting us when there is a downtime scheduled to happen and ensuring that those downtimes happen outside of business hours.  They are quick to help and answer questions when we have them and always so polite with their customer service.  They are very easy to work with, and we will not be thinking about switching any time soon.