I haven't looked into it yet, @jarvie was explaining it to me in Amsterdam but at the time I was happily engaged with SplinterRents. The other services will be taking a bunch of 'refugees' in soon so it's worth considering.
SPLEX must be jumping around with joy and if it wasn't so bloody expensive I would be jumping on their bandwagon.
I used to do all this stuff manually before the emergence of the rental services, and now with these charges, the need to update frequently is going to be gone.