In the following S&T review comparing ten sets of different brand Plössl or similar design eyepieces, the Celestron Ultimas came out on top, on a par with TeleVue Plössls:
Alan MacRobert and M. Barlow Pepin, "Your Basic Eyepiece Set", Sky & Telescope
, April 1996, pp. 38-43.
I have a copy of the above article. If you're interested in having a read of it to help make up your mind, feel free to PM me.
I would have jumped on this deal a couple of months ago but after the lingering excitement of my recent galaxy observing experiences I'm thinking about jumping on the wide-field bandwagon...