It can work for light users who don't really care about speed if they get something decent, otherwise is a very bad idea, not to mention that it's basically impossible to avoid shades or guarantee any coverage at all.
The ISP I currently work for (in Spain) is playing with this idea for sparsely populated areas, where we didn't lay FTTH yet and our customers are connected through DSL. It can potentially save a lot of money on deployment but the current BTS locations are not enough, we'd have to build at least 2x for decent coverage, update their links and so on. I don't know, I think we will just lay FTTH in the end. Dealing with saturation on wireless connections is very difficult sometimes.
The ISP I currently work for (in Spain) is playing with this idea for sparsely populated areas, where we didn't lay FTTH yet and our customers are connected through DSL. It can potentially save a lot of money on deployment but the current BTS locations are not enough, we'd have to build at least 2x for decent coverage, update their links and so on. I don't know, I think we will just lay FTTH in the end. Dealing with saturation on wireless connections is very difficult sometimes.