I buy the 1 minute oats. I don't really have a brand preference, but have been eating Millville Brand the past few weeks (Aldi)...I also buy Kroger brand.
On my diet, I just do 1/2 cup of oats + 1 cup of water. I add 2 tablespoons of creamy Jif peanut butter, and drink a cup of black coffee with it. That's a 390 calorie breakfast with whole grain and protein to hold me until lunch. Occasionally, I'll replace the peanut butter with a banana....or add the banana to my breakfast if it's a running day.
I don't add sugar or cinnamon, but you can if you want. I'm just trying to cut a lot of extra junk out of my diet until I cut weight right now. (down 12 lbs in 3 weeks)
How the oats are cut makes little difference, despite what people say:
http://www.prevention.com/content/whats-healthier-steel-cut-oats-or-rolled-oats
There just isn't enough difference to make a big deal about it. Mares eat 'em, Does eat 'em...and you know little lambs don't.