I have a V7.1 and a Quantum Competition that are over 5 years old and I've got two Sphere Comps that are 1 year old. I've never had a problem with any of them and I'm surprised to hear that it takes so long for AE to repair LRP's speedos as I've also never had a problem with AE customer service.
(I got a bad speedo from Novak 11 years ago and I haven't given them another chance; I've always been a fan of Tekin and it will be very hard for me not to pick up one of their new speedos when they come out. I'm almost hoping that they won't be as good as I know they will be!)