Fourth of July holidays is not a good time to need parts quickly and the 1501s I needed had a poor track record of working, out of the box (many rc forums I checked out). In this case, they arrived on a Saturday, July 5th, and I am pleased to say both are now operating my hexacopter retracs perfectly. Also, 2-day priority mail from the post office is cheap, reliable, and continues to be an awesome deal for shipping. Fedex and UPS has lost almost all my business.