Short answer: Yes, if you want your phone slim, free of scratches and looking different. A skin costs less than most cases and peels off cleanly when you want a change. It won't protect a phone that falls, so add a thin case if you drop yours often.
What you get
Scratch and scuff protection for the back (and the side edges, if you pick that option), from a layer about 0.2 mm thin.
A completely different look for the price of a basic case, with hundreds of designs to choose from.
No change to how the phone feels, charges or fits in a pocket or car mount.
Who it suits
People who dislike bulky cases, people who want to keep the phone clean for resale, and anyone who likes to change how their phone looks.
Who should pick a case instead
If you drop your phone often, a case protects corners and the screen edge in a fall, which a skin cannot do. You can still use both: a skin under a thin clear case.
Quick questions
Is a skin cheaper than a case?
Usually. EaseWrap skins are cut to order for your exact model and cost less than most branded cases.
Does a skin lower resale value?
No. It keeps the back free of scratches and peels off without residue, so the phone looks cleaner when you sell it.