I use the 18" Bigfoot on my old XLT and its much the same as the Cleansweep though with the advantage of "absolute value" as a setting (you can use the full length or half).
When mucking up my times for beach hunting and arriving before the tide has started to retreat or a stiff wind is blowing the waves much further up than normal its handy to work the top dry strip for recent losses. Whilst a Sovereign user is still slowly sweeping the first hundred yards I'm quarter of a mile down the beach really covering ground.
The depth loss compared to standard coils doesn't matter as your going for maximum ground coverage rather than depth and will get out to the less used areas way away from the beach entrance points that are not used as much but also don't get the attention of most detectorists.