I have been checking these out since they were introduced in the magazines and I found the write-up very impressive. I finally got some money to buy a 4 cell pack for my 12th scale. I always seem to be a step behind at the track--I hav ethe right car, right motor, right tires--must be the battery. I could only get one, but I am excited to try it out as soon as it gets here.
My only issue so far--shipping. Man is it expensive for one battery ($10.25). I wish there were a USPS option. I find them cheaper and more reliable (especially living in a very small town) on almost all accounts.