I'm designing a wireless sensor network that will need to operate in a mesh layout. I came across the Synapse RF engines a few weeks ago and they look like they're a really easy way to throw a bunch of nodes out and have them create a mesh automatically. I'll need an arduino at each location anyway, so maybe it's overkill and I could go with the XBees instead. Are the Xbee units easy to set up in a mesh for a noob like me, or should I go with the Synapse ones since they also have the Portal software and the USB snap stick which gives me a pretty good headstart?