Pros: It is a great gadget to shock your friends, really convincible. I'm using to write normally right now too. You use as self defense too AHAHA

Cons: The shock is not that strong, but it is still worth it. The quality is not great,the clip has broken off already, but what do you excpect for two dollars.
Shipping is slow! But, FREE!

Other Thoughts: It works as a pen so it makes it easy to fool and shock people. I suggest singling out people in order to maximize the number of people you get. Otherwise, when some else hears your victim scream, they catch on quick.

Bottomline: The best $2 dollars I have ever spent!!!

Pros: This is a Great Product with endless uses. I am a sheriff and I use them for my Laser Sight.
They seem relativly powerful compared to other brands. I am sure they will last a while it has been a week of continues use and they are just as strong now as when I put them in.
Trying to get that many batteries at that price is almost impossible. I have seen a Five Pack for a dollar at the $1 Store, but that is still not great.

Cons: Because I am in the USA and they are in Hong Kong; the Shipping & Handling was Very Slow! But, it was free so even that is not a major concern!

Other Thoughts:

Bottomline: Worth the wait!