Also, Leslies on-line has their Chlorine FAS-DPD Service Test Kit that's currently about $65. This, too, is like Ben's kit or the Taylor 2006--it'a made by Taylor and re-branded, but the retail stores don't sell it, only the web.

I think the main advantage is that Ben's kit comes with lots of refills, is well-organized, has a log, etc. But the Taylor and the Leslies kits are, in terms of measurement, just as good. Refills are all Taylor and available from either.