Product review (4 stars): Good, not great
This product consists of two components-- a gateway, and a sensor.  Let me start by saying I had to order these units two times.  The first set that was delivered the gateway would not register with my account correctly with Lacrossealertsmobile.com.  So, I tried a work around by attempting to register it on the old site weatherdirect.com, and when I tried there it claimed that the gateway was already registered to someone else.  I am not sure who is to blame here but it seems likely that I got a refurbished unit rather than one that is brand new.  I suspect foul play on amazon's part, and I wouldn't be surprised if this is the problem so many are having with these units.

The second unit that showed up had a hard time connecting to the lacrosse alerts mobile system.  After changing the DNS settings on our LAN this seemed to fix the issue.  After that everything was more easy to setup.

Overall I cannot give this unit 5 stars because there just isn't enough functionality when it comes to configuring the units.  Having to wait for red blinks and factory resets is a real pain in the rear and there ought to be a way to configure these via web portal just like an IP cam or other network device.  Of course they want to make their money though so they probably won't ever provide this.

Overall for the price this is probably the best option out there if you are on a budget.