I have spent the past few weeks putting the Ryobi through it's paces and it is definately a keeper. Here's a quick video of it turning a decent sized oak log into splits for next year. Turn the sound up for the crunch!
(broken link removed)
(broken link removed)
Granted, there are some pieces that it can't get through, but they are usually VERY stringy and have very imbedded crotches. The key is identifying the parts that will split the easiest, the same you would do with a maul.