All these expressions can be used io talk about different things. Divide them into two groups: positive and negative. Add some more

Positive: It's really invaluable! it's terrific! It's very helpful! It's really nifty. It might come

in handy. It's just the thing. It's exciting.

Negative: It's no use. It's totally useless! It's garbage. It's junk. It's terrible