Hard to have a nice yard, when neighbors have a Dandelion Nursery!

Tried it. You will get rid of dandelions, but the Scotts Program does not touch Crabgrass, clover, nut grass, spurge, and a lot of other common weeds. Plus, their crabgrass preventer does not lay down a barrier that lasts all season. I am not a Scotts fan.
Get you some Tenacity herbicide for your pump up, it's a post and pre-emergent broadleaf
herbicide labeled for turf.
The Trimec formulations work well too.
I wouldn't rely on a single compound herbicide to kill hard to control broadleafs.
My side business is noxious weed control, I've never had a problem with controlling lawn weeds.
The fall application is the most important.