I had one on my recent bungalow. I had a love/hate relationship with it . It was at its best in the spring and autumn, even the winter sometimes, on those days when the sun shone but it was too cool outside. In the summer, it could soon get untenable if the sun was out, and generally in the winter too. Then it would be horrendously cold even with the big radiator going full blast and the halogen heater as well. The worst was when we got gales. We were high above town near the coast and fully exposed to the southwesters. Then it could be terrifying in there, feeling the panes moving and fearing roof panels being ripped off. Which did happen once.
On the whole, given a sheltered site, I think they’re great, the light getting into your brain gives you a far greater sense of well-being than sitting next to a window.
My new house won’t be having one though, it will take too much space off my new smaller garden.