Aftermarket additions (Capetown Diamonds)

[jpup]

Knowing that adding an aftermarket (non rolex) diamond bezel and other additions would void Rolex servicing your watch- how many of you have done this? I started looking on the forum to buy a watch for my husband as I never really was attracted to Rolexes for myself, but in the course of looking for a watch for him I have found one I like for myself from Capetown Diamonds. It is an older presidential with some of their "Geneva" add ons. I don't buy watches with the idea of selling them later and Capetown has a lifetime servicing guarantee, so what do you all think?
Also, if anyone has seen their "Geneva" additions- how do they compare to factory Rolex diamonds? thanks for any advice