Innova 3612 compression tester any good?

[toolaholic]

Hi all, I scored this from Amazon for $14 something? Are they decent or is this too inexpensive? INNOVA 3612 Compression Tester - 4 Piece Kit https://www.amazon.com/dp/B000EVU89I/?tag=atomicindus08-20

 

[toolaholic]

Bump

 

[Superbec]

Check with compressed air or known good one .. ,how expensive must be a gauge so it can be trusted, it's all up to you.

I do prefer expensive torque wrenches though.