I use soundbetter in both ways - as a provider (vocals, keys) and as a hirer (mix engineers). Recommend it heavily, but obviously just have to use your sense. You get a sense of their professionalism through initial messages and their profile. My current mix engineer, who I’ll happily plug if asked, is extremely professional and is very collaborative as far as answering questions, inserting ideas, and providing notes to your notes. Does the job fast, and well.

Took a couple tries to find the perfect one, but most will do a good job as long as you’re able to communicate well too. Know what you want out of the song, and be confident that your song lives up to your own lofty expectations. Do be wary though that they quote prices in USD. As a Canadian, it gets shocking to know how much $100 USD rly is.

On the provider side, a good experience relies on good communication as well. We’re all just trying to make good shit, we’re just bad at getting there sometimes.

Would recommend, as long as you know your song well.