I've got one sitting here in my office. It's been running pretty much non-stop for the last 15 years. A few months ago I noticed the lamp had stopped working. A "love tap" on the top of the case restored it, for a while. Now it seems they're out for good. In a well lit office it isn't an issue, I can still read the LCD display.
As for the E-Lock switch, I never noticed that either, I guess we learn something new every day.