I feel like the site is light on details about how it actually works, but I'm intrigued.
You have to get many more screen shots showing actual use on your website. I'm not seeing any. Hard to say much w/o seeing that. Can't even pass it along to anyone who I might think is interested without more of that.
I would imagine mobile suits this very well because reactions and praise are immediate and device in always in your hand no matter where your physical presence is (you may not be near a laptop or desktop).
Soon you won't ever have to talk to your boss! Thanks computers!
That being said, I think this is a good product to sell to companies that choose to ignore the real "problem".
Everyone has things they could improve in, and being frank about that is a hard personal problem which no tech can overcome.
(Had a hard time finding details on the website)
However, if other hackers out there are looking for ideas, I think there's a strong need for something similar to this but targeted at businesses with younger, wage-based employees. Think restaurants, hotels, and retail businesses. Their needs are slightly different but I think a feedback tool would be valuable.
I hope the Impraise team can make it work - waiting a year for performance feedback is a stunningly stupid notion.
http://techcrunch.com/2014/08/11/impraise/
Really glad feedback is moving in the direction of smaller, more frequent interactions.
They have shut down now but you can see info at their site still http://www.microeval.com/.