4 star for install- picture for installation of straps not in instructions... use photo from Amazon ... crucial! 4 star durability- still get a bit nervous about strength to hold child on high bed... a bit flimsy but could be that I didnt screw down... weight of mattress should be enough. 5 star assembly- super easy to put together... I consider myself your average person with these things.
Not loud... clicking when locking into place provides me more peace of mind then anything. Easy to fold down with simply push of buttons on both sides.