Excellent service from iFixit, my battery and fix kit arrived just a couple of days after ordering.
I found it pretty easy to replace the battery, the most difficult part was replacing the metal plate covering the battery connector as the screws are tiny and the plate kept moving around due to the magnetic screwdriver!
I was pleased to see that by using the free trial of iBackupbot ( http://www.icopybot.com/blog/check-ipad-... ) the new battery was indeed new, with a charge cycle count of just 2, however the full charge capacity of 1200 is slightly less than the original battery which supposedly is 1440mAh.
Here's a link to the before and after screenshots of my battery status and a time lapse video of me doing the replacement!
I took a little extra time removing the gunk that was around the edge of the screen, from almost 2 years of usage!