As usual, you get what you pay for.
Craftsman is one of the many generic lawnmowers out there that I consider to be more or less disposable. This type of lawn mower is fine for it's intended purpose. It will mow grass and probably work fine for several years, but after 5-10 years the plastic parts will start wearing out and it's not worth fixing. If that's what you're looking for, then Craftsman is probably just as good as any other. You can run it into the ground, wear it out, get your use out of it, and then throw it away and buy a new one for not very much money.
If you're looking for more of a long term investment, look at Simplicity, Cub Cadet, John Deere, or something along those lines (Not the ones sold in big box stores) Name brands like these have a lot higher quality, and you'll be a lot more likely to fix them over the years and keep them longer, but you'll also pay the price for them.
It just depends on what you want.
There's nothing wrong with using disposable razors.