Compact II is a much better toilet than a Jabsco, but...
For about the same money, the PHC, which is the same pump as the PH II, but on the compact base to fit in the same space as a compact, is a MUCH better choice. It also now has a shorter handle than the PH II, which helps too. Or the full size PH II, if it'll fit. The PH II has been rated the best manual toilet < $500 on the planet for nearly 3 decades. Although the PHC version of it has been out for several years, Raritan has yet to put it on their website...but because the pump specs are the same for both versions (except the PHC can only use the smaller "standard" bowl), you can read all about here: http://www.raritaneng.com/products/toilets/manual/ph_2.htmlDefender http://www.defender.com/ or boatfix.com http://www.boatfix.com/elec/rarph2.asp have the best prices.