to do both. I've been using it for over 9 months and have taken it to and from the booth many times. The ball joint stays tight and the spine enters fairly securely. It doesn't "snap" but the friction is enough for it not to fall out just yet. The suction cup sometimes fails with extreme temperature changes, but that's to be expected. There's also a loop on the back of mine that I could attach a stylus to for easier menu navigation. Very good product for the price.
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