i can't comment on that specific model, but have read plenty about other motorized vga screens. to date, all of them are given horrible reviews..
since the last review, i have read that lilliput has updated their screens to use metal gears instead of plastic, and have not heard/read any updates on the quality since..
1. lilliputs became known for stripping out their plastic gears that motorizes the screen in/out, and up/down. as stated above, lilliputs revision could have changed that..
2.xenarc's have become known for breaking the video-ribbon-cable that goes between the main chassis, and the lcd. i am not aware of any updates to correct this issue.
from what i understand almost all screens suffer from similar problems-- though many problems don't become evident until a couple months/years down the road.
if you happen to have really good luck, please update this thread, so others can hopefully use them as well.