My dd (5 1/2 year old) and I like math alot (I have a degree in mechanical engineering). We are almost through with year 1 of MEP, and were never bored. We have looked at and and tried sample pages of Singapore, but so far have thought that MEP was a better fir for us personally. We complete all the Lessons Plans as they prescribe (the worksheets are great, but so are the additional activities, don't skip these, they are some of the best parts IMO). My daughter loves the variety, and the pretend shopping and so on... We are not opposed to spending money on a product if we think it is worth it, however, so far, MEP is offering us more.
DD is stronger in Wiggly Willie, Sociable Sue traits and weaker in Competent Carl, and Perfect Paula traits, so far...