anyone use paul buff white lightning strobes?

we have a used set at work im thinking about buying

looking for some more feedback though from those who actually used them

look like this: http://cgi.ebay.com/ws​/eBayISAPI.dll?ViewIte​m&category=30087&item=​3864803731&rd=1

tech specs here: http://www.white-lightning.com/retired.​html (wl model)

instructions here: http://www.white-lightning.com/wl5kand1​0k.htmlheres some reviews

http://www.photography​review.com/pscFlash,an​d,Lighting/Monolights/​White%20Lightning,Stud​io,Flash,System/PRD_85​085_3136crx.aspx

I have them both White-lightning & Alien Bees Love them.
I started with the two Alien bees 800's early this past spring and stepped up to the white Lightning X1600 by mid summer. I went from shooting simple portraits to larger groups & wanting the metal casing thats why I went to the WL. Both good buys for the $$$. Not crazy about the softboxes, I prefer the wescotts or the photoflex but the lights has done very well for me. I plan on getting one more X1600 soon.