We've had a great time using the desk booking system from Ofisly. We've been using it for a few months, and it's been really good. The web and mobile apps are easy to use, so I can easily book desks, even on my phone.
I really like how easy to use Ofisly is; it is very transparent, saves a lot of time, and is anti-anxiety - it ensures people that they will always get their place without worrying if they find a desk or a place to park in the morning.