Hey PM, I have the HeadBlade Classic and it's been serving me well for the 16 months I've been sly. Unless you step on it, I don't see any reason for needing to replace the actual HeadBlade.

Since I went sly in Jan. 2007, I've changed the adaptor twice (the basic adaptor for Atra double blades), so I'm guessing 6 months per adaptor. You'll know when it's time to replace the adaptors when they start to fall out easy when you're rinsing them off. You can get adaptors at Headblade's website and they cost $5.49 for a 3 pack (seem overpriced). I bought a few three packs for combined shipping.

Hope that helps.

Guys-

               I bought a pack of HB triples at Walgreen's and it came with two adapters. There were four blades and the two adapters in the package and i believe it was around $8.

I've had the plastic rail that the adapter clips onto separate from the main body after about 2 years of use.

I think everybody gave you good advice hear.  But to be totally for sure you get the best shave you should probably change adaptors at least every six months.  I think it was on the HB website where it says replacing the whole HB once a year is a good idea.  But if it's still going strong I wouldn't waste the money.  But definitely replace the adaptors.