Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very good planer

I have owned this thickness planer for about 6 months and used it for a few projects. The surfaces are excellent on a variety of woods--so far I've used it on curly maple, cumaru, cherry, poplar, and oak with no issues. Dust collection is good with just my whining shop vac attached. Set-up was a snap and worked great right out of the box.So why not 5 stars? Two reasons: first, the "optional" extension tables are not at all optional. Without them, the planer has significant snipe; with them attached there is no appreciable snipe (<1/64" at worst). At this price point the extension tables definitely should have been included, and I would not recommend buying this planer without them.Second, the knives are disposable, which could run into significant expense down the road compared to sharpening them. Replacement knives run about $50 a set. Thankfully I haven't needed to replace them as yet.