S.
We have Royal Crest and love it. My family had it when we were kids too and it was so convenient- usually ends up being cheaper than the grocery store. Also their milk comes from the same network of dairies that service/produce Horizon Organic milk- so their milk is pretty much organic & all-natural but for some reason they're not allowed to label it as such. Also depending on where you live in Denver, Royal Crest might be the only one that delivers to your house- i think Longmont and Karl's serve only the northern area.
enjoy!~