I find the plus model easier to hold without a case. A case makes it too large to have a good grip on it.
I've gone caseless several times without any issues. It does require some additional cautiousness though.. For instance, I would never keep my phone together with sharp objects, and tend to have a phone reserved pocket in any backpack or purse. I would only not recommend for a phone that has a complete glass design, back and front (such as old Xperia phones and the newer Samsung phones). It does depend on the model of the phone though, as I imagine some will be more slippery than others.
I've gone caseless several times without any issues. It does require some additional cautiousness though.. For instance, I would never keep my phone together with sharp objects, and tend to have a phone reserved pocket in any backpack or purse. I would only not recommend for a phone that has a complete glass design, back and front (such as old Xperia phones and the newer Samsung phones). It does depend on the model of the phone though, as I imagine some will be more slippery than others.