Ride it. Probably will be OK. Wal-Mart sells lots of bikes every day. I see people commuting to work on them. Look at instructional videos online on how to do adjustments and repairs, as needed. Parts and supplies can be bought inexpensively from Nashbar, Niagara Cycle Works and Bike Wagon. Some stuff you can grab at Wal-Mart. You can upgrade to a better bike later. Nashbar, Performance, Jenson USA, Bikes Direct, and sometimes a local bike shop will have great deals on slightly older model bikes. You may even find something nice and practically unused on Craigslist, or at a garage or rummage sale. You have something to ride, so you can be a little picky. The bike was spec's at a certain quality level, replacing stuff that isn't broken is not an efficient use of your money. Better to put that money into a sinking fund for the next bike.