I only have four (so far and I have missed a few at auctions) GP's with their manufactured years from approximately 1938 to 2001, specifically chosen because they each have a different styles with flair. I can almost track the case design routes into the latest GP's now on offer. I have never met anyone else face to face who owns a GP, which satisfies my desire to be different. Each year GP only manufactures a relatively few watches with high quality IMO. Did not Ian Fleming write in Casino Royal at the opening that Bond wore a GP? Not my reason for owning GP but an indication of considered, understated style. However there are some GP's (Hawk) that are not my type!
A modern Rolex is too common and I think rather vulgar and overstated. Look at the annual production. Nearly as many as Seiko/Citizen! "I have made it, so I have one!" I do confess to owning only one Rolex, but it dates from 1936 and is with an art deco case and dial, which I love. Now only ever worn at home to preserve it from dust and moisture although it was much admired a while ago when I occasionally wore it on holiday at dinner.
I can vouch for the service from GP Switzerland. One of my Ritcheville's had a missing case-back screw after it was returned from a service with my local repairer. I think he had not noticed and I did not wish to upset him because he is very valuable to me and did a wonderful job in bringing that watch to "as new" regulation.
I emailed GP and asked for a replacement screw and a spare, offering to pay, plus postage etc. I was quickly sent 4 replacement screws, absolutely free gratis. Perhaps I should not shout about that! That compares with the lack of help I have experienced from other manufacturers who only want to have the whole watch sent in for an expensive service (and an awful case polish and re-dial) when a small part like a setting spring is all that is needed. Thank heaven for the internet! I digress.
Best wishes to fellow GP lovers!