I think these are great. Yes, they are a bit more fragile then other glasses I have but no more then my nice set of china. They take to the dishwasher just fine, but you can't casually toss them in like other glasses. These are unique and beautiful glasses and with a touch more care, they will make a great addition. I love mine and use them every day.
I've put mine through the dishwasher with no problems but I take special care not to have anything close to them so there is no risk of breakage from banging into each other. Sometimes putting them next to plastic items works well.