I purchased this product to do some minor work on several watches I work.The tools in the kit are not exactly professional-grade, but they are more than adequate for small repairs, such as removing or adding watchband links, replacing the batteries, etc. So far, here's what I've done with it:- Completely replaced a damaged Suunto Advizor case- Replaced battery on a Nixon 51-30 Chrono (this is a oversized watch with a 51mm case)- Replaced a band on a Samsung Galaxy Frontier S3The only negative inSee full review