Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Simple and effective

It does what it is supposed to do and is fairly simple to use. The only (albeit slight) complaint I have is that the pins bend fairly easily. Other than that, it's like an unstylish car - it might not be a pretty accessory and it may have a quirk or two somewhere (which I haven't discovered yet), but for the most part it's uncomplicated and reliable.