Re: Economical chronograph
All depends on the users expectations for reliability and accuracy. The Shooting Chrony clearly meets yours, so you should stick with it, and save the money it would take to replace it with a more expensive unit.
As has been mentioned, if a user has to plan on fudging the MV from his chronograph, he might as well save the initial purchase cost and just shoot a few extra bullets down range and develop the MV back calculating from measured drops at various ranges.
If a user wants to obtain accurate ES and SD, the chronograph has to demonstrate reliability and accuracy. So it just depends on the users needs and expectations. The stop watch is the way to go if economy is the driver...