Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Two years of using these boards

I've bought three of these cutting boards (in three different sizes) two years ago and we have been very happy with them. They are thin and light, seem to be friendly to our knives, we wash them in the dishwasher, and they have been holding pretty well to daily usage. They have not warped, nor have they developed any smell. Of course, there are lots of knife cut marks, but it looks like we'll be enjoying these boards for many more years. Highly recommended.