This looks like a well-made unit. Packaging is quite nice. I would forego the nice packaging for grammatically correct instructions. Any instructions on how to remove/replace the remote batteries would be appreciated as the doors on the controllers don't seem to be intuitive. Also, it would be nice if there were instructions on how to get/program additional transmitters...they are missing an up-sell on that. I found an good quality/inexpensive/compatible window raising module....ebay won't let me paste the link here but you can search by: Universal 2 Doors Auto Car Automatic Power Window Closer Module Tools Kit
I love this system I love that the module is constructed of metal and not plastic I also love that the user manuals are highly detailed on which wire goes where Everything works like it’s supposed to including the key pad and remote start definitely would recommend it to anyone I installed it myself in about 2 hours.