I was just looking at stuff on the GC shop and not sure what I'm looking for in a good grinder. I know I want a 4-piece, but I don't need to get anything really high-end. I wanted to keep it under 30 bucks and was looking at this: Black Leaf - Anodized Aluminum Herb Grinder - 4-part - 50mm - Grasscity.com Is it good for the price? Any other recommendations? Thanks in advance.