Who here has Auto Up and down windows installed in their car via aftermarket alarm?

Several installers and a friend of mine told me that the DEI 530T's are having problems and dont work the way they are suppose to. They all are issuing a warning and recommend doing the DEI 529 instead which would be only auto up as it is safer. I know some of the forum members here have this installed auto up and down in their cars, and it would be cool if you guys could chime in and state weather you windows have been working fine or if you've had problems with the device.