This was because I had an old iPad and the Ultrathin version would be ideal only with the newer iPads (due to the way a niche is used to prop the iPad up). And because I am afraid of being overly ostentatious during meetings, I think.
I love my Tablet keyboard! It works with anything, and it looks like it can take a beating or two. It was going for a significantly lower price than the Ultrathin. Much as it is so much less gorgeous than the Ultrathin, I do like it and am very glad with the purchase. I mostly use it with the iPad, for writing, and for taking notes at meetings. On days when I don’t feel like lugging an iPad along, I pair the keyboard with my phone.
If you are slightly into portable writing, and don’t want to spend too much on a tool, I think the Tablet will suit your purpose.