I just got one of these. I choked a bit on the $200 price, so bought an open box from Amazon for $155. Looked like a totally new unit to me.

Simple installation, but the video wasn't working. Called them up, and reset the unit (hold down the orange button inside for 15 seconds) and it worked fine.

There is a lag to the motion detector, but in general it works fine. I'm often out of town, so it's great to know when there are packages left.

Mine is wired into my existing doorbell, so no need to charge it. I really like the intercom, especially as I have UPS packages picked up from the house. I just wish that my front entrance had a clear view of my mailbox, too.