There is a lot to recommend this. It is incredibly tough and lightweight, perfect for taking on the hills in bad weather, which does terrible damage to traditional maps, even when kept in a map case.. It covers pretty well all the Lake District, barring some fringe areas, and the detail is good enough for most purposes. The additional benefit for climbers is that virtually all the climbing crags are marked.
There are obvious pros and cons to the scale used. You might need a greater level of detail, in which case take a 1:25,000. The biggest pro is that when navigating in the hill I can cover a bigger area on one fold, and the level of detail is relevant to hill walking and climbing.