Ditto on doing the tests yourself!

I also have the Taylor K-2006 and believe as long as you follow the directions properly you should be fine ..
i.e.
1) keep titrants vertical when adding
2) obtain water sample 18" from top (and not from return area)
3) use sample immediately .. don't sample from large quantity from large bowl that you have obtained water sample (in order to prevent multiple arm dipping .. some people don't like that apparently)
4) try to maintain same/similar drop sizes when adding titrants
5) try not to expose your chemicals to direct sunlight (store in cool/dry place)
6) cya testing is very subjective .. see http://www.poolforum.com/pf2/showthread.php?t=7761
7) ensure that water sample is fairly accurate ... when looking at comparator tube .. ensure mid-portion of waterline matches 44ml/25ml mark (and not the sides)

8) you may want to log your progression .. you can see history and what chems you added when and what effects have occurred in the past

hope this helps .. i too am from Toronto region .. not sure where you get your chem testing from .. but when i was acquiring my kit .. the store had been testing someone elses with titrant method ... poolmaster .. off 401 .. south Leslie St. ... they also stock titrants and other smaller kits (as well as k-2005)