They work good, kinda pricey though.
We use them in our offices at work. Water is up to full temp. in around 5 seconds. I would check the amp. draw before buying one unless you just want it for dockside. These type devices usually draw quite a lot of power, maybe more than an AC unit. On the upside they are about the size and weight of a hardback book. I've been giving one some thought myself.
