The design is just superb. Now I can't imagine a day without my Gillian cup. Plus, you can wash it in your dishwasher. The only limitation I know of is that it's rather small, I'd appreciate a little bigger cup.
It doesn't leak and it's white so it's suitable for other tableware. Just a cup.
Our family is satisfied. We bought it for our friends who visit us at home and to make it a good debate topic, we had them inscribe with our family name. Loveable thingy.