Well, maybe a little, because it's a shame this useful security device has to be retro fitted rather than being part of the original spec. (it's also a pity to have the original seat post clamp sat around with nothing to do). That said, the extra peace of mind that comes with having the battery locked in place justifies the relatively small expense. The locking clamp is well made and looks to be of similar high quality and finish to the original. It's simple to fit and has the same tenacious grip.
These locks secure the seat post (which contains the battery) so is a very good idea to aid security and replaces the quick release lever the bikes come with. They are easy to use. I’ve given it four stars instead of five, only because the bikes could come with these from new.