Our 12yo cat took ownership of us in Spring this year, as her previous family were having to move into no pets allowed accommodation. She settled quickly and is a very independent girl, although mellowing slightly now.
I've just sent the emails booking her into a local cattery for 2 holidays we have coming up, and am feeling oddly weepy about it. 
Can anyone offer "been there done that" reassurance? I have never used a cattery before (a friend used to in-house cat sit for my previous cat, but she moved away). We visited the place and the owner lady was lovely and showed us round, answered all our questions, we saw cats in situ and they were all quite happy, the pens were fine too.
I am worrying that she will hate being in a pen, as opposed to her current free run of the world, and then hate us afterwards. Then we'll go and do it to her again a few months later (first time is 6 days, second is just over 2 weeks!)