They'll work, and if you use them lightly (non-abusively), will perform satisfactory for a long time. No, they're not Snap-on or other top brand, but they also cost 1/2 to 1/4 as much. Use them until they don't do what you need, or they fail, and by then you'll have a good idea of what you need to replace them with. If they don't fail, you'll have your answer already.
There's a lot to be said for using tools appropriately rather than abusively. I think that flat rate pay for mechanics has a lot to do with the current mentality of use a tool up and get it warranted when it breaks. When flat rate wasn't as prevalent, it seemed mechanics took more pride in using their tools appropriately and maintaining them in top condition. Now, if using up $50 of life out of a tool makes you 4 hours of time, it makes sense to abuse it and save the time.
The good thing about this change in mindset, though, is that ratchets and top quality wrenches have gotten a LOT better in the past 30 years. Ratchets are much stronger and work better today than they have ever before in history. Good wrenches and sockets are hard to break, unless used abusively. We live in the golden age of tools, lots available, high quality available, and not terribly unreasonable costs.
