Our co-working spaces uses this tool for booking meeting rooms. It's very easy and convenient. I love the integration with the iPads next to each room so that when you check-in the info is updated on the website. It's also good cause it shows the capacity of each room, picture, ... etc.
There is not much that I hate about it. Possible one improvement that could be made is during scheduling a meeting. When you're inside the scheduling page of a room, you dont have full visibility over the time slots available. So when you choose an end time it might tell you that your reservation finishes at during another reservation. It should prevent from choosing such times in the first place.