We have a Thetford 27 gallon. Works good. We really don't use it for the black tank unless we have to. The 4 wheel tote tows great and drains good. Just one thing I have learned is when draining make sure the hose is fully pulled out and the tote is uphill from the dump. Had the tote for about 5 years so far.
2011 jayco 33rlds, 2002 Ford excursion, v-10, 3:73 gears 4x4 mine. 2008 Suzuki sx-4, hers. Retired Air Force, now Retired.