I've had mine for over a year now and I love it.... I've only used it three times because I don't need to trim all the time.
Pros:
It only cuts the split part of the hair
Cons:
None really, I go really slowly to make sure to catch all the ends.
It takes some getting used to when having to switch hands. There is a small directional switch on the machine that you have to pay attentin to.
READ ALL instructions that come with the machine!
-HTH