While it has some limitations and you need to create multiple accounts to form a team - which is very confusing - it's a decent service if you only need something basic without many features.

On the other hand, the embed section already has several limitations:

- You can only select two colors.
- You can only choose two font types.
- And only one background.

Beyond that, they don't allow any further customization, regardless of the logo you place on the embed.

What they do for you is:

- They modify the calendar as they see fit (don't expect to adapt it 100% to your site - you never will).
- For the font you select, they impose the size they want (don't expect design consistency).
- They change the responsive size arbitrarily (sometimes it looks good, other times it doesn't). Expect it to look decent on your site occasionally, but later everything looks terrible.

Apparently, they have no interest in fixing these issues.

Basic functions the embed should have:

- Hide or show elements based on client needs.
- Add options for all fonts - at least the most basic ones:
- Font size.
- Line height.
- Styles: strong, semi-bold, etc.
- Show or hide agent images.

Basically, add any type of customization. At least for what's been requested, I don't think it's that difficult. The rest can stay as it is.