Yeah, I like the soil blocker. The soil you use is very important. If the mix isn't right the blocks will fall apart. I found one bagged soil mix that works but there are a lot of recipes around for mixing your own.
I need to get one of the bigger blocker. We only have the 2 inch and some plants, like squash, quickly out grow a 2 in block.

We have a very different problem growing tomatoes and peppers, trying to keep them alive through spring. Our last frost day is in mid April but we sometimes get frost and hailstorms into may. Last year, I transplanted tomatoes in the middle of May and the next day it hailed. They lost a bunch of leaves but luckily managed to survive and produce a decent crop.