I use the 1st gen of this tester:
http://hobbyking.com/hobbyking/store..._Generation%29
In fact it has been plugged into every pack I have ever owned, repaired or reconfigured. Great tool to check your lipos before you run them, if they have sat a while. Plus in a few seconds you can check any packs you are storing. I like it as it lists all of the cells on one screen, not individually like the one you linked to.
I have a few different ones, including the one you linked bondo. All are great tools, and for a few bucks you cannot go wrong. That and a cheapo harbor freight multimeter are all I have used to build packs. I have nicer tools, but these work fine and are always lying on the bench ready to go.