Sorry for late reply, but yes
@Fifthgrace i am fully converted to wider tyres even on older narrower rims, and have now converted nearly all of my road bikes to 28's.
They definitely offer more ride comfort over 23's and 25's i used to run, so i won't be going back. Besides the roads where I am are in a terrible state and seemingly getting worse so any extra cushioning is welcome.
So yes if they fit in your frame (the rear is usually the pinch point) I would recommend 28's. Note on 1 of my frames the rear wheel does not fit in the drop outs with the rear fully inflated. I forgot this last time i punctured on that bike, and I only have a micro pump so after getting a headrush after pumping it up, I had to deflate it and then put wheel in frame and then pump it up again, by which time I was knackered and ready for a nap