My son got the feather SS with pro-guard and he is on his second blade. The first blade lasted him 10 shaves. This second one is on the 13th shave so far. He is new to straight razor and I think they could last him longer with better technic.
I have used his feather 3 times now, with pro guard blades, and it is on my list to get one for myself. I think it is very similar to the steel straight and those pro guard are very forgiving (IMO), but sharp. Get BBS with 2 passes and minor touch ups.
Double O