From Slipped Disc reader, Jennivine Doo:
Here’s our experience with United with purchasing a cello seat:
Purchase your cello seat separately from passenger seat with United, you may end up paying 6 times more than what you were quoted over the phone, but won’t find out till you receive your credit card statement because United does not send an email receipt of the cello seat within the 24 hour cancellation period. In fact, after more than one month of request, I have NEVER received a receipt.
After we booked our daughter flight for the 2 week Christmas break, she wanted to know if she can bring her cello back home to record her audition….
Read more here.