I needed a precise parametric EQ to perfectly target 2.8kHz, and at this low a price I thought I'd give this a go before I splash on something like an Empress EQ.
The lack of any specific numbering around the dials beyond simple 1 to 10 meant I had to run a signal generator through this to figure out where 2.8kHz was located. The same went for the Q dial as well. Beyond a certain high frequency point, I found that it acted less like a bell EQ and more like a shelf according to the EQ analyser I was using.
Trying to level-match the volumes of the bypassed and "default" settings was not easy. Level at "5" didn't actually mean 0db gain/reduction like you'd think, and finding the same for the gain dial of the EQ was equally as awkward.
For simpler applications, I've no doubt this pedal would work fine - it just wasn't for me.
The construction was fairly solid and I imagine it could take a hit or three without issue.
The input and output felt very stiff. It was awkward to plug cables into, unlike all my other pedals which would just click right in.
The pedal came with a battery though, a GP Supercell, the exact same model that came with my bass guitar that lasted years before needing replacement. I bet you could run this pedal off the battery for years also (so long as it also comes with a GP or similar).