Joe,
No, I've never used the Sharpmaker, so if I sound like I'm bashing it, I don't mean to. But I have used similar non-guided arrangements in the past, and I'm apparently one of those people that can't keep the angle consistent.
As far as the use (or non-use) of oil with hones is concerned, I've tried both. I'm using diamond and synthetic hones, and have had a lot better luck when not using oil. But that's just me.
Now, I'd really like to try out the Edgepro Apex, but for the price, I think I'll stay put.