what i don't like about box store bikes is that they only come in one to three sizes. when i wanted to start commuting, i was looking at the schwinn varsity from walmart as an entry level bike. but it only came in 55cm. i'm a tall guy, and i need 58 to 60cm. I'm glad I didn't get it, because knowing me I would have spent a lot more on upgrading the cheap components.
If the bike fits you, and you don't mind the quality of the parts, then go for it. however, I would suggest being prepared to replace any pricey components if they break. otherwise, the bike is just gonna sit in the corner.