[nbened]

Quality has been tested against every other service and matches or outperforms them.

Many of the current users are native speakers, and every day I work with them to get it better accustomed to what they're expecting

I put a live demo on the site though - I encourage you to verify this yourself!

[8organicbits]

Sadly my non-English language skills are not developed enough for me to be a good judge. I think you'll usually be selling to people who don't have the language skills to evaluate quality. Some kind of independent analysis of quality could help.

[nbened]

I agree, and I actually do have people who are native speakers and not interested in the project that I work with. Hopefully with some time it can be something substantial