Don't have one, but I've been looking. There are lots of options out there, but before buying I'd recommend looking for unbiased internet reviews of the system.
Things to look for: Size of hard drive (1 TB seems to be the new standard), resolution, night-time picture quality, # of cameras supported, cost of additional cameras, ease of monitoring system over internet with smart phone etc, system power consumption (it's going to be on all the time, right?). Also the software interface: how easy is it to review footage, set parameters, etc?
I also looked briefly at Netgear's ARLO system, but didn't like that it was all internet based.