I have used IRD freewheels and think they are great. If you want to re-configure freewheels, make custom freewheels, search for vintage freewheels on line have at it. If you want to ride you bike and do what most people do which is forget about the t freewheel, than IRD is great option.

In addition I have found that the cheap freewheels have a wider body or more spacers or whatever. They sometimes have trouble fitting into vintage road frames. The IRD freewheels I have used, have never had this problem. Also some of the cheapies make indexing difficult because of what I am guessing are loose quality control tolerances and the spacing between the cogs is off a little bit. Not an issue with IRD.

If you like to tinker, freewheels will give you plenty to tinker with. I am not interested in saving $25 and relying on the cheapest possible option, 40 miles from my house.