I don't currently own any myself, but a few of my colleagues in local orchestras have either a tambourine or one or more triangles from Black Swamp, and I've always been impressed with the sound.  Another has a Black Swamp snare drum, and the workmanship - and resulting sound - are outstanding.  Eric Sooy knows his stuff.

I'm not in the market for any new triangles or snare drums, but I'm planning to upgrade my tambourine collection with at least one new instrument, and for me it's a choice between Black Swamp and Grover (and maybe Vaughncraft).

Havent played their gear. Only know of their reputation which is supreme.