Tested so far it's good enough for basic scheduling with personal friends (non-work related). The team really spent huge amount of time to polish this product as well as gathering feedback from fellow sumo-lings. Most of the issues faced are resolved and would love them to polish it further. What's important that are missing in this product in my opinion are:
1. To set available times in increment of x minutes. If I want to allow meetings to be available in increments of 15 minutes, such as setting meetings available at 1pm, 1.15pm, 1.30pm, 1.45pm, 2pm, it is not possible under current scenario.
2. To set up private booking. E.g. links only events only available to certain people.
3. Allow different calendars to be blocked instead of primary calendar only. There are 2 calendars on my use case, work and personal calendar. Typically, I allow work calendars to be viewed by co-worker but personal calendar to be off-work (such as weekend events). It will be useful to be able to choose events to be tied to other calendars.