Of course Thermacells are the best if you're hunting stationary. Everyone that has used them know they work great... I've dealt with them since their very beginning many years ago. Bowhunters from the U.S. brought the very first models up to my bear camp before most people had ever heard about them.
But, Graps asked about bug dope and what I was trying to say earlier was that when you walk, pack, stalk, work, or fish, etc. in bug country, in bug season, you need a plan "B".
Sometimes wearing a bug suit/headnet will be the answer but sometimes bug dope will suit the situation better.
The bug dope that is pure deet (or mostly) is terrible on equipment. In fact for a few years I had to put up with not seeing the gauges on one of my trucks (it was new at the time) because of hunters getting deet on the see through covers (obviously not glass).
In my unbiased opinion, and after trying all the ones in the stores over here, to me and others (including Canadian military people I know) feel that Watkins is as efficient as any and is more user friendly then pure liquid deet.
And there are no doubt, other excellent bug dope products out there.