I feel like I have been saying this a dozen times per week lately.
We started with MUS. Novelty of the blocks wore off quickly. Both mom and daughter got very bored and dreaded MUS lessons. It basically is a quick look at a short video, then 6 pages of worksheets. The pros is that it is one of the very few programs my 4 year old daughter could do pretty much independently. But she didn't like to work alone, we both love learning together.
A few other math programs, enter RightStart. I rave about this program all the time, but in short, it totally works, it is fun and creative, and we finally look forward to math!
We do one lesson at a time, it takes about 20 minutes, sometimes over if we do the games (per my dd's request). We're finishing up RS A in the next few days and starting B in July.