Very nice devices, RTC + SD Card + XBee socket built in, LIPO charge/interface with solar charge capability built in, shield compatible, etc. I've purchased several and am quite happy with them.
I did look at that one but I have the xbee shield/module with antenna, a breakout board for a ds1338 and a sensirion sht75 and an LDR to put in the box as well. If i get a plastic one its easier to make modifications and drill holes where you need them, I guess i could mod a metal one too.