Misubishi compatible with Gecko?

bay ha some servo motors going for reasonable prices:

http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1708697091

which they point out are compatible with the Mitsubishi controllers.

Would anyone want to respond with positive experiences with using
servo
motors of this kind with gecko drives?

There are a lot of Mitsubishi motors at this site:

http://www.meau.com/eprise/main/Web_Site_Pages/Public/Products/Servo/P
-Servo-Family

Color me a rocket scientist but I cant track from the pile of pdf
files at this site
what is a DC servo, and which are compatible with gecko-drives.

Any comments?

owen