Bought a couple these to to augment one I have had for a couple of years, amd sought out this particular make as they are tried and tested. Are they cool? Passe? Who cares - they are hard wearing good quality stuff. Better buy soon though before the trade sanctions make them impossible to acquire ;-)
Two volumes means each volume is thinner than in a large each way dictionary, and in my experience that makes them less likely to split. Collins give the genitive of every noun, which I like. Comprehensive vocab, with plenty examples, and useful grammar tables.