freelastchance
:D I haven't used those ones, but they look like good ones. I use the Zapperplans.com one and I got it #1 because I'm frugal and was a bit scheptic. I had a ZP one a couple of years ago and lost it somewhere, so I got a new ZP about 6(+) months ago. Some of the things I like about it are - The size, it's super compaqued. - The rings, they are very convenient and seem to hit the right spot. - The price, not just because I can afford it, but I can recommend it without feeling pushy. - The low battery usage, it doesn't waste power on a bigger board, so it lasts longer. - The simpleness, it's just plain easy to carry, easy to use and easy to convince people that they are not going to get electrocuted!
I wish you the best with yours, and just do what works for you!
Here's a picture of mine in the gallery if you haven't seen it yet -