Bought this for an unruly pet, great design and easy to use but 2 weeks in 2 of the prongs broke off in the carpet. This was very disappointing considering how new the machine was. Customer service was quick to tell me where the closest repair shop was with no real explanation of the policy. Pretty disappointed as I live in a city with no car and it's extremely inconvenient for me to travel a far distance to get a machine repaired that I just took out of the box. Okay craftsmanship and poor customer service.