Instruction: Classify these as positive or negative reviews: "Interesting concept but execution left a lot to be desired", "Would have loved it but the main character was completely 1D", "One of the best horror books I've read in years", "Would see it again"

Response: "Interesting concept but execution left a lot to be desired": negative, "Would have loved it but the main character was completely 1D": negative, "One of the best horror books I've read in years": positive, "Would see it again": positive