Just wondered what other 'nest boxes' peeps have around their house/garden/allotment and what their success rate is? Best moment?

Last year we (well okay the hired help!) put up a pair of martin boxes under the house eaves. To our great delight they were occupied and a family of martins was raised - fabulous! (We had an idea martins might nest because our nextdoor neighbours had a real nest in their eaves).

Not had a lot of success with other bird boxes as we don't have enough cover in our garden yet.