Drive Medical Raised Toilet Seat with Lock, Standard Seat, 4"

Does the Drive 6 inch raised toilet seat fit both round bowls and elongated bowls?

Can the original toilet seat & cover remain on the toilet with this raised seat in place?. How easy is it to put on and take off?

Would your recommend this product for a travel eg. when visiting family? How about simply "around town" aka restaurants?

does this come elongated