This is almost a must when you bring your tenor/alto-saxophone to gigs/rehearsals. You never know whats the local/situation youre coming to.
Even so, it`s used at home as well.
It is a very reliable, extremely easy to mount/dismount (done in seconds) and you keep it inside the instrument, so no extra space needed. It fits my tenor perfectly.
It includes a nice bag made of cloth when kept in the instrument.
I absolutely recomend the version that is called "jazz".
No doubt worth the small extra cost to protect the instrument!