Older Bahco chisels are good to great. The older red Bahcos are hard wearing, the inbetween models (brighter red) are not so har wearing but ok. Newer (made in Spain) chisels are brittle, very sharp but chip easily. The orange black handles are not as sturdy but they work ok, if you really need to bang on your chisels they are not the right choice.
The best chisels I have ever seen are old all steel E A Berg chisels from Sweden (pre Bahco). I thought I had seen good chisels until a few weeks ago when my colleague brought his old chisels - they cut so smooth and was a real pleasure to use. I have a lot of Bahco chisels but they are not in the same league, except for the older ones (made by - guess who? E A Berg - later turned into or bought up by the Bahco concern).
The EA Berg chisels are all quality steel and can be sharpened and honed until all steel is gone. My colleague put together a kit consisting of ten of his fathers old chisels - we are talking chisels from the 1920-30-40 and they were in various shape and sizes. Two hours of sharpening and honing and a quick wax polish and they were amazing, sharp as can be. They will outlast me as well, and the oldest one is clocking in on ninety years of use and abuse! 8)
They require a coat of oil/wax if stored for a long time but hey, with that quality of cut I wouldn't mind doing it once a week.