I had the pleasure of using a friend's Timberwolf TW-2 splitter a few weeks ago. It was solidly built and well laid out. We had the 4-way splitting wedge on it for most of the time we were using it, and it just powered through the wood. Impressive and a pleasure to use.
He was thinking of selling it. I would have bought it on the spot from him, but wanted one that I could eventually upgrade to a hydraulic log lift. For that, I'd have to step up to the TW-2HD or larger.