The only problem that I have with sweep frequencies is that the zappers do not stay long enough on any one frequency. They may work better for somethings but I have not seen any solid evidence yet.
I have not tried or tested that specific zapper, so I can not be completely objective.
I am releasing a couple of new zappers in the next few weeks and while some of them use stepped frequencies ( similar to sweep ), each frequency is applied for at least 3.5 minutes ( some Rife frequencies ) and most are applied 7 minutes or longer.
The tradeoff is that it does take longer to zap, but the result should be faster to achieve and more complete.