Will,
I do have an Euromaster II, but I must say that I do not use it very often. Of course, it works without batteries at any temperature, but it is not that convenient to use. What I most dislike is, that the (built-in) case does not close with the incident-metering dome attached. This configuration is rather unhandy and circumstantial in case you need to change the sensitivity from low to high or vice versa (by (dis-)mounting a strainer insert before the sensor). Otherwise, the Euromaster is an astonishing small and solid device.