The 2nd time I made this I doubled the sherbert, I put 1/2 in, freeze 10 min, put 1/2 the cream cheese mixture, freeze 10 min, put remaining sherbert, freeze again 10 min, then final layer of remaining cream cheese mixture & freeze. Much better - not so heavy, lighter & fresher tasting. Got rave reviews from guests!
I also made this with pineapple sherbert instead of lemon/lime and left out the juice in the cream cheese mixture, and instead I added a small can of crushed pineapples in it's own juice & a can of frozen Bacardi Pina Colada (non-alcoholic) mix. We couldn't decide which was our favorite!