S.G.
Hi J.,
Your son sounds a bit like my 13 month old right now. I have seen and used the Wriggle Wrapper, and if he doesn't like being strapped in, I think he won't like it very much.
Full disclosure: we sell Stokke Tripp Trapp chairs in our stores. And I know the Tripp Trapp seems like a lot of money up front, but consider this: I bought one when my first daughter was 1, and that was almost 7 years ago. Since then, we have used it nearly every day. And the benefits we've had as a family have been more than worth the approximately $.10/day it has cost over the years.
On the days when my son won't sit and eat in a high chair, he usually will sit at the Tripp Trapp, especially if I'm sitting with him.
With that said, it's also very normal to see changes in appetite with babies, especially around a developmental milestone. If your son has recently started crawling or walking, chances are, he's very focused on practicing his new skill, and isn't as interested in sitting down for "boring" meals. Be patient - it will pass.
For more information about the Tripp Trapp, visit our website (http://mbeans.com/stokke-tripp-trapp-classic-high-chair.h.... I've seen the inventor speak about the origin of his design and he's really a fascinating guy.
Good luck!