Let me start by stating that I am subtracting one star for the dismal, hard to access location/bathrooms in desperate need of an update; otherwise, I'd give a solid 5 stars for the incredible selection of fine junk food offered in the convenience store. Overall, I would rate Green Valley Grocery a solid 4.5 for the selection and customer service.
While the shop itself is quite small, it offers Boyd's organic coffee, a fancy customizable coca-cola machine (like the ones at Terrible's), a milkshake maker (basically ice cream and a special machine to mix it up--it looks pretty freakin' awesome), ICEE machine, a large selection of candy and snacks, etc. Oh, and it's really nicely air conditioned for those hideously hot Las Vegas summer days.
I would also like to highly commend the staff here; every one of their employees is friendly and willing to accommodate special requests. I am working a construction project on I-15 and asked if they could carry the flavored Perrier waters since I prefer those over the unflavored. The next time I was in the shop, they had stocked two different flavors to accommodate my request. Honestly, I was shocked and totally impressed. Even high end stores typically don't fulfill special requests--and if they do--it takes a ridiculously long time. Also, today I went in for a Cherry Vanilla Coke Zero, and to my dismay, the machine was out of cherry flavor. Since this happens to me constantly at Terrible's I figured the employees would tell me I was SOL and that they couldn't fix it. I was thrilled when a man that appeared to be the manager said no problem, we can fix that and sent out an employee to correct the issue immediately. This whole process took about a minute and I was able to get what I came in for. Again, I was totally impressed.
Overall, I highly recommend this little spot if you're hungry or thirsty, and happen to be in the area.