I don't recommend Kensington KeyFolio
When I purchased my iPad Air, I also purchased a Kensington KeyFolio for iPad Air because I wanted a cover and a bluetooth keyboard. The keyboard is very problematic often missing key presses. I do not type quickly and have my share of errors but I know I press the keys and nothing shows up on the screen. I am frustrated to have to go back and fix all the typing errors. The KeyFolio was relatively expensive and I thought I did my research but obviously I didn’t do enough because I recently checked out more reviews of the KeyFolio and found frequent mention of keyboard problem. The case is nice, I like the leather and the extra bulk isn't a problem for me but I do get frustrated using the keyboard and often find myself using the on screen keyboard.
In the past I have had good experiences with Kensington products which is one reason I never researched more. I did contact tech support and they offered to replace the keyboard but I never followed through because I had trashed the original packaging, finding alternate packaging and shipping is problematic since I am disabled and cannot easily get out to a shipping carrier. Frequently I use an Apple's wireless keyboard which came with my iMac.
Jim