After using the software in a 1h call and seeing great quality of both video and voice (perfect sync of video/voice and very good sound isolation from nearby noice), I can only recommend it. The video team call we had was recorded (not completely) and this made a 51 min recording that was immediately available on AWS after the call. The size of 51 min video is 402 MB at a 1280x960 resolution and 20 frames/second and audiobitrate of 63kbps. Some small text is not perfect, but the quality is OK and given the free storage size, I am not sure you could say anything about that.

My suggestions:
1. Option to pay for 1080p recordings. Perhaps some monthly fee to keep 5GB storage or save locally after call would be a good idea.
2. Add scheduling options to calls with clients
3. Create a roadmap of the features that you are currently working on and what is expected. Also "wishlist" from the community. This is typical for startups offering products on appsumo and without it, you won't have big success here I believe (example is a previous deal: https://ora.pm/roadmap)
4. Incentives for more codes. Right now, I really don't see why you would purchase extra credits. If 3 people can create unlimited rooms, that would be enough for small/mid-sized businesses, since you always have only a few managers that lead the discussions and the rest just following along.