The Good: resonably priced, ramped teeth help shifting
The Bad: racers will want a tighter cassette with smaller jumps between gears
Though it has been out for a few years, Shimano's 11-36 cassette is a game changer for those who are looking to minimize the front chainring set-up. The extra spread in gears allows mere mortals like myself to power up climbs and still bomb the downs with just a single ring in front.
Shimano drivetrain parts usually means durability and quality, and this is no exceptionafter a couple of years of abuse. Hopefully this trend continues and we'll see a range like 10-38 teeth take hold in the mainstream offerings from the big drivetrain players.