I own a Hair Salon that is completly carpeted,,even under the hydraulic chairs at the work stations (With rubber mats directly under the chairs.
( i have an eversion to cold,bare floors,,am just a carpet kind of guy)
I bought a G4 to use in the salon, when they first came out, and soon found out i could not use it in the salon for vacuuming the carpets, as the exhaust blew the hair away from the machine, before i could vacuum it up! Was VERY frustrating.
Too bad, but i solved the problem by trading the G4 for a Heritage 2, with the G Series top fill tube installed, so that i could use the G series Micro bags in it. Also had a more agressive brushroll installed in the Heritage 2, which makes it very easy to push and manuver,,and grabs up every last hair on the floor without blowing it away from the machine.
Works like a charm!