Great Concept, Poor execution

The concept is great. I often fuss about apps (Mac OS X) that use one side of the keyboard and being ably to program keyboard commands per program is fantastic However, the keyboard spent 3 sets of batteries in 2 weeks. It was easily interfered with by common office supplies. If I set my cell phone on the desk within a foot of the keyboard, soda can, metal binder clips. It would skip letters and so proofreading became ever critical. The mouse buttons would randomly cause webpages to minimize and maximize randomly. It was REALLY frustrating and it cost me productive timer, I really wanted to love this product. Unfortunately I plan to return this item.