I have a pair of their bourbon glasses (the smallest ones) and use them frequently. They have a nice heft to them and accommodate the occasional ice cube.
"Drinking when we are not thirsty and making love at all seasons… that is all there is to distinguish us from other animals."
The Island looks a lot like the riedel O and the lowland looks glencairn.
I'd go highland- the inbetweener.
In what respect is any of them superior to a Glencairn at half (or less) the price? (That's a question, as I always have to tell my wife, not a criticism.)
If God made anything better than bourbon he must have kept it for Hisself.