Actually, the Aquacheck salt strips are not that bad. I have checked them against a properly calibrated Goldline salt meter (and also got the same salt reading as the Goldline meter on a MyronL meter when a local pool store did the test) and the salt strips only read 50 ppm less. The readout on my Goldline ps-8 SWG read 100 ppm higher than the 2 meters.

However, a drop based salt kit has a much greater accuracy than the strips which vary in accuracy with the salt level (accuracy resolution goes down as salt level goes up). so at higher salt levels your accuracy might be on the order of about 500 ppm vs. 200 ppm for the drop based test.