I have a 18 yr old Series 3. I've replaced the OEM head with OEM heads as needed. It still works a new, but the shave was more of a "weekend and vacation" quality shave.I didn't really need to buy this, but wanted to give it a go hoping for a closer shave with the series 8 head, although I wasn't expecting much.It does shave closer and faster than the old more noisy series 3. It's not quite a blade shave, but it seems close enought to a good shave for better than weekend company. The series 8 OEM head replacements are pretty spendy, so I hope the head works well for months. I used the old 3 off and on, sometimes not using it for months, so head replacements were infrequent.I didn't use the 3 with foam, I don't expect to use this one wet either.