I'm about a week-in with my M4 13", and it's totally-fantastic. I charged to Full after he was delivered, and he's still at ~70% charge. I really loved my 2015 13" MBP, but I could easily kill the battery overnight just by closing the lid 
The potential for cordless, extended use is phenomenal.
The real test will be using him over the Summer: I'm attending two Seminars (traveling by air), attending intensive classes for my Teaching Certification, and generally expect doing nothing too demanding.
BBEdit, Affinity Designer/Photo, and Transmit (Panic) will be my heaviest apps.
The fit/finish of the Air is extraordinary, and the weight is good.
More to come.
The potential for cordless, extended use is phenomenal.
The real test will be using him over the Summer: I'm attending two Seminars (traveling by air), attending intensive classes for my Teaching Certification, and generally expect doing nothing too demanding.
BBEdit, Affinity Designer/Photo, and Transmit (Panic) will be my heaviest apps.
The fit/finish of the Air is extraordinary, and the weight is good.
More to come.