We've only had our cat for just over 2 months so we're new to this. We booked a vacation for next Spring and the condo says it is pet friendly. We thought it would be nice to get a soft side carrier and bring our cat with us which would mean putting him under the seat on the airplane. Have you ever done that and is it a good or bad idea in your opinion. We have lots of time to decide but I was just curious what your views are on this.