We just started.
We're currently combining Sonlight 3/4 & 4/5 Plus Language Arts K. We also have Artistic Pursuits Preschool coming (waiting....waiting).
We're using P4/5 as the kindergarten program, its the best all combined Kinder program of all the ones we looked at, we have all the extras like ETC primers, LA K, etc.
Next year, DD5 will move on to grade 1 and we'll get seperate subjects, mostly based on WTM, but with a few additionals/others.
DD2 will stay on P3/4 and I am unsure as yet whether we'll keep DS 3 on 3/4 or move him up, and if we do, we may omit the Language Arts and just keep it as a preschool program.
We'll definately stay with Sonlight for the younger years, once we get to grade 1 we will seperate, but will still use their readers, Read alouds, and any interesting lit that ties in with our program.
MFW looks quite interesting, but we just added our own stuff to make it similar, most of the lit-based programs all look pretty much alike, they just tend to differentiate with their extras (like MFW has puzzles, and ant farm, we already have 5000 puzzles, and we just purchased 2 interconnecting ant farms to go with the learning about ants bit in Sonlight, plus the ant explorer book)
Bottom Line: We love Sonlight P4/5 for Kinder, and you can add as much extras/tailoring as you want, or keep it as simple as you want. We also use Handle on the Arts for P4/5 activities. So we have a whole heap of extras, started at 8:15 this morning and ended at 10:30, and the kids are happy enough playing with their beautiful items they made now. This afternoon I will put one section of mathtacular & rock n learn on, then give them a box of toys to play with, and if it ever stops raining, they can go outside lol.