Im going to try and explain the usefulness of this peice. If I miss anything im sorry and please dont flame on.
Pre rajas this is the ideal WS body for SAM imo. Im working on getting a Kirin's osode but having a tough time figuring out how to keep my 6 hit for WS'S with it. With this that becomes no problem at all. I can stack STR with alky's, rutters etc and not worry about my 6 hit being ruined all for the cost of -1 STR. This is WS only though and pointless after getting a rajas ring.
Sorry for the long post but domaru's do have a tough time :P
Well I don't know about all of you, but it seems great when you're soloing as a samurai/dancer. I mean no negatives like the hauby does and the latent affect on the set is going to be active the entire time when you get above 100tp. Though I will mention that I wouldn't wear the set in a party though.
I can't really fathom how 3 acc and -1 STR makes this comparable to the cost of an Osode considering how many other jobs can use it... if you need this for your 6 hit build, something is amiss >.>
Not fail just limited use. There are a few options available at this lvl. If you're a SAM, you'll be a mage's nightmare with all your blinking from equipment swaps.