Hi Orchid - This question seems to keep coming up for me and perhaps some of you have thoughts on the matter.
Personally, I think clarity enhanced diamonds are an excellent value. Customers seem scared away from them, sometimes for (what I think) is the wrong reason. Durability, specifically susceptibility to clouding or other issues during re-tipping and repairs that require the torch.
My understanding is that the newer treatments are totally fine and stable under heat.