I was lucky when my 99G failed as I think the wind hit it square on and buckled it backwards. I straighted the inclination bolt and the bracket and welded some extra support, its been fine for years but I wouldn't use it with a solid dish, has to be mesh (perforated) in an exposed location. The main part of the motor is very well built in terms of the pole and gearbox which is diecast, but the pole mounting bracket is just not upto the job, they haven't used a thick enough gauge of steel.
Not as well built as its predecessor the 90U, but much quieter, although its still a noisy fecker compared to a Diseqc mount and has a slight amount of hysteresis. But its extremely quick and very reliable after fifteen years, so I'm not quite ready to chuck mine in the bin just yet.