I was personally very unhappy with it. I returned it due to low output and erratic operation. Deal Extreme or stonetek would be the place to go for an inexpensive green pointer, IMO.
I never owned one before (RadioShack doesnt appear to be th epitome of laser distributors to me) but from the looks of it it appears to be just like a cheap ebayser..... Not that it is horrible-any green laser pointer to a certain degree is cool as hell, but it isnt something i would buy considering only about 4 times the price could get me something WAY more powerful and durable.