Pros: Hand tracking is excellent and generally responsive... maybe too responsive.

Cons: Hardware: It's very sensitive to illumination conditions, falling back into a "Robust" mode that has slower responses under relatively normal office illumination conditions.

Software: The input method is too finicky and frustrating to be used for more than a few minutes at a time. As such, it has essentially no useful software. If you expect to purchase this to use it for something on day one, forget about it. The company failed to implement a development strategy that would allow the device to be useful to non-developers. There are apps available on the somewhat anemic app store that one can purchase (for extra money) that aim to fill the software gap. But they don't.

It is likely that a small cache of games is the ultimate target for this hardware. I can't say I came across any good ones, honestly, since after a few buyers-remorse experiences in purchasing disappointing apps for the device, I decided to stop wasting any more money on the platform. Even for gaming, no developer (that I've seen) has demonstrated any unique advantage to the Leap controller over a Kinect or a regular touchscreen, which many already have.

Other Thoughts: The whole notion of fine hand/finger-based gesture input hasn't been thought through (by the company or anyone else) to the point that it could be useful for interacting with software productively. Again, this leaves only trivial applications, such as one-off games or artistic interaction with screen-saver-like "experiences," which I imagine are more engaging for those who aren't entirely sober.

As a gullible early adopter, I am self-interested in the growth and maturity of the platform. However, there is little evidence that this will ever happen. Unless third-party developers or the company tackle the serious development shortcomings, I would not recommend purchasing a Leap Controller to anyone.

Pros: Works generally as advertised. Comcast had some trouble with the pairing and had to come back twice. That's just par for the course with Comcast and Cablecards. (Why is sending a tech out to your house even necessary?? Everything important to getting it working is done remotely on their end.)

Cons: Cannot act as a network tuner. That's disappointing.

Other Thoughts: Like others, I bought it because of the Black Friday rebate. I didn't get the rebate check. The manufacturer's email address for inquiries is dead and just bouncing emails. That seems an awful lot like a big bag of mail fraud.