I think Weblate is really ready to be released as 1.0 release. It runs pretty stable on https://l10n.cihar.com, I got some bug reports from others, but these were quickly fixed and now nobody complains.
The issue tracker lists few improvements which I plan after 1.0 which will help in user experience and performance, but I see nothing what would be needed right now. So I'm ready to release (even before deadline I have set to this milestone).
Anyway you're welcome to give it some testing and complain if anything is broken. One area where I desperately need feedback are checks, which probably still miss variations for some languages.