I kinda like it - the pictures are crap, but it was useful to me when I had to check the resistance of a thermocouple / diagnose climate control issues.
The one problem I had is that I have to bypass the page with the adobe acrobat reader check and I can't use firefox (
).
Of course then again, I design websites in my spare time so I'm familiar with this sort of thing and I can do that (even bypassed that 123 video at the start).