I've used this before and I really like it. My house seems to attract wasps and yellow jackets. At this point I tested this spray and while I can't attest to a 29' spray, it easily reaches the shutters on the second floor. As far as I am concerned, the further I can stand the better when getting rid of these pests. Since they are not out yet, I am going to make a leap of faith and suggest that my past successful use of this will hold true as far as killing power. Spraying power, I can attest is just fine. $5.99 at ACE Hardware but you can usually catch it on sale and save a couple of bucks.
If reviewing a product, it may have been received free of charge. That will NEVER have a bearing on my recommendations.