Upgraded from a lil 13", low power magnet sweeper to this. Great sweeper with adjustable wheel height (comes at lowest setting, which is great for areas cemented, not great for dirt or grass), telescopic handle, and a quick "pull" to release the items you've picked up. All n all, rated 4 stars because of build quality, 5 stars, and adjustability, 3.5 stars, which could use some re-engineering.
Important points: Critical to get your wheel height right, especially dealing with uneven ground. the release is not electromagnet. It releases by separating the magnet inside enough from the surface that grabs the materials you're sweeping.