In reply to Bulls Crack:
Well since the YMC guide lacks convenient, year-round-reliable, clean, quality, low-grade stuff compared to Peak guides and most of the routes there were already listed in earlier guides I'd say the new lines are a very useful addition. You list stuff to guide people to climbs they might want to climb and lower grade climbers buy more guidebooks. In contast too many of Heptonstall listed climbs are vegetated and unlikely to attract any real attention without a good clean and even then probably won't get more than a few ascents a year. I've never seem a climber since publication on the Black Wall area and only a few on Lower Quarry, depite all the starred lines.
Not taking lower grade climbers seriously is a 'nail in the coffin' for definitive guides. For lower grade climbers interested in Yorkshire grit, the improvements in the double volume (compared the previous guide) are significant and offer way more route possibilities, better grading and more useful information on the classics than Rockfax, as well as a wealth of lower grade bouldering and all the fun articles on local leading edge climbers and their contributions to the area history.
Post edited at 21:52