When I first got my GSL I thought is shot just like my broke in Geo3 but once is was broken in, just as smooth as a Luxe. Maybe not as quiet I'd say, but still very quiet. The GSL is more efficient and more reliable and feels better in the hands IMO plus PE's customer service is the best in the business and has more tech support than any company out there if a problem should arise.
So for me it's an easy choice
The Other Athlete