I bought the Onpack of beurer and am impressed by the design and handling. The device is small and portable, the heads are easily exchangeable and are of high quality. The bag is sturdy and well go. The only complaint is the fact that according to the manufacturer the device is to be operated for longer than 15 minutes at a time because of overheating (fairly short for manicure and pedicure). However, the device during the test run was only slightly warm, it was therefore also used longer, and it worked fine.