Only down side I can see is SMD microcontroller.
In Massimo's talk at the Bay area Maker fair he said there will be a through hole version soon.
The Leo. has many cool features, some that I found in the latest IDE release, but it is still a bit unknown and will take time to learn.
I think UNO is the best you can make it a HID using the DFU programming + you have that DIP processor too!
You cannot access our store from your country. We apologize for the inconvenience.
I think in this respect leaving some minor errors in PRO MICRO http://tenettech.com/product.php?id_product=1739 from SFE its alltogether totally same as the Leonardo, am i correct?
Leonard may have "interesting" issues with running "serial IO" to a PC concurrently with a sketch, since it'll have to run "USB CDC/ACM" magically in the background. The need for a USB stack will also cut down on the maximum user code size.