Sorry, I haven't done any wireless ones, but I helped my dad put in a wired one in his house last year. Do not, under any circumstances, purchase a Zmodo system. It is a total POS, and you can't access it remotely with anything but the program included on the disc that comes with the system, not even the download from their website. And God help you if you try to access it on a phone. It's basically a crap shoot on whether it's going to just go into a buffering loop or actually work. The only thing that does seem to work is the snapshots that get emailed to my dad of raccoons at two in the morning setting off the motion detector function. Also there is NO documentation for any of their systems ANYWHERE.
oops, that turned into a rant. Don't buy Zmodo. Make sure whatever system you get has decent documentation and support. That's all.