For many people who have invested recently in new and expensive equipment, having the warranty kept intact is important, and therefore this kind of partner repair service could be a great choice. This will not be the case, however, if your equipment is well past its warranty, and you have no need for this kind of insurance against breakdowns.
However, before you go to any kind of repair service, deciding whether you have a warranty that you want to keep intact is a good idea. If not, you may very well find that any quality service provider will be fine, regardless of whether they are a brand partner or not.