Im a noob cuber, my best time is 52 seconds and I average about 1:18. I use a layer by layer method because I find it too hard to keep track of all the side cubes and edges in the Fridrich system. I find that layer by layer forces everything down and allows for you to search less. But anyway, searching around the forums here I've seen mention of all these different types of cubes and how some are incredible while some are quite poor. My question is how many different cubes are there (brand names and such) and what are the pros and cons of each?