I have an IC-40 hooked to an intellitouch. I love the thing. From what I've seen, opinions on SWG's vary depending on who has what brand. Some are better than others, im sure. I can only comment on the IC-40. My pool is 14,000 gallons, so the unit is over-sized for my pool. Which, IMO, is a good thing. I also believe that a few problems people have with them is that they get generators that are under-sized. Some people have reported that the low or check salt light comes on when the salt level is fine, but in most instances they were field calibrated, or pentair replaced them. The newer ones dont sem to have the issue, from what i can read, but YMMV. However, this issue is not really limited to the pentair, either.
The IC-40 works nicely with the Easytouch since you can set the output to any percentage and are not limited to the 20,40, 60, 80, and 100% that you have using it manually. I would recommend since ive had no trouble with mine generating all the chlorine i need.
How many gallons is your pool?