Big fan of using standups asynch, especially with remote team members.
Used a similar solution in the past but I prefer this one due to the flexibility that is built into it plus it is free ofc ;)
I've been using Olaph since its beta and have only encountered one bug that has been fixed since.
Bug/Issue that has been fixed: Olaph wasn't responsive when I tried to answer the pre-selected questions after the weekly meeting had already begun.