I own the the Night Vision NexGen Monocular that I bought at Walmart for about $175. I posted the link for your review: http://www.walmart.com/search/search-ng.do?search_constraint=0&ic=48_0&search_query=night+vision
The webpage says not sold in stores, but I bought mine in my local Walmart.
This is a not a google but a monocular with night vision capabilities; it has built in infrared, is light weight, and comes with a case. The only problem I experienced was accidently leaving the infrared on overnight and draining the battery.
The link above also includes ATN Viper googles. Good but limited night vision capabilities for $270. It allows you to drive at night but in rough terrain the head harness may become loose.
Being in the military I was spoiled with night vision capabilities; however these work reasonable well for recreational use such as looking at animals, buildings, walking on trails, etc... However, do not expect to read maps or see other small object close-up and clearly.
If you do purchase, don't forget to by the battery (or two) in the electronics or photo departments.