Good instead of excellent because this was the second replacement but it may have been something I did. This is my favorite bird.

I also have had problems with that unit and It finally malfunctioned today Nov 19 2011. but it has been through moderate crashes.The Cx3 MD520 N is a Great Helicopter. woul like to Have The CX2 It looks like a lot of Fun . I contacted Tech support and They Are taking care of the problem with minimal Cost. Horizon Hobbys are A good Company with very helpful People in Sales, Josh, Linda, and Pepper and In Support Chad, todd and Andrew all are very Professional, Kind and Helpful. I Own the MCX, MCX2,, 120SR and The MD520 N CX3 when flying it handles Great . I Sure that Blade will correct the design Problems with the 3 In 1 so Thanks To all At Horizon Hobby.

I give it 3 stars bc i have had it a little over a month and its broke, never crashed it or anything...ill see what horizon hobby does about it, but after i bought it i heard other people having problems with these as well.

Works very well, when working, but, this unit does not last very long. This purchase is the second time that I've replaced the "3n1 Control Unit". Counting the original, this is the third unit in a two year old helicopter.