[Gpa113]

I purchased 4 for a Club Class,  and find them excellent. 

They are very even across all four lanes, and make for great racing. We use them at 10.5 volts, and have tried various race formats,  including no marshaling and step up Finals.   They are forgiving to drive, and really good for less experienced drivers.  No issues with any of them so far, so well pleased,  and as Brian pointed out,  Slot it parts in a decent chassis for an almost give away price. 
Enjoy them