Yes DFCO is awesome
most newer cars have it, my Caddy has it, my parents cruze and my bro's sonic have it, and coasting down a long ass hill not using gas is a great thing haha!
The old "brakes are cheaper than a clutch" thing is true if you're downshifting wrong(just chucking it into gear
). If you can Rev match then its very little wear on the clutch, and the transmission and engine have no problem slowing the car down, I drove my cobalt for almost 4 years downshifting and NEVER had an issue and I'm now driving my ATS the same way, I do double clutch though if I'm gonna be skipping gears.
I used this site to learn to rev match, great explanation.
Rev matching & gear changing technique
Anyways, once you have the hang of rev matching/downshifting you'll do it all the time lol. Its easy once you got the hang of it, all you're doing is blipping the gas up a bit before downshifting to match the engine speed to the road speed, reducing clutch wear.
But yeah, when you're coasting in gear above 2K rpm or 1.5K I think, around there, reset you're average fuel economy meter and you'll see it start diving down to 0.0L/100km
Besides all that driving in gear is just safer anyways, I wouldn't want to coast in neutral in case I gotta step on it suddenly.