We have used Enom since 2007, but lately have been using netearthone more (Since October of last year).
I have found netearthone more helpful in the support area then ENOM and we are slowly moving our domains out to netearthone. The first three no problems. The two that we have just done it took longer then it should. First there were problems with the EPP codes then ENOM took it's time to release them. (They released them only after a support ticket was filled out. Were told that our supplier was responsible for support but explained that this really had nothing to do with a tech problem but a problem of unauthorized holding. Domains released that same day.
"To see is to see a better way, to perceive any problem clearly is to begin to create its solution. All we need is the wisdom and patience to keep looking and the love to hold what we see up to the light of understanding." Laurence Boldt.