If you've used a Learning Tower, which I only learned about from HB, please tell me about how useful you really found it to be.

Also, if you have a closed all-around vs. open learning tower, pros and cons? I tested a closed off one in store today. Thought it would be nice to start having K watch cooking, etc. But she was trying to climb out of in in less than 2 min.

Yay or Nay?