I don't have one, but I have used one as I have ordered one for another department. The unit is quite small, and incredibly light. It works quite nice, it is verry is sensitive. It measures mains frequency when nothing is connected.
I did miss the option for external in/outputs like a trigger out and 10MHz in and out (except for the 10MHz input on the front. I don't like the 2 inputs with different ranges too. You can measure quite some different settings, but it cannot measure between or compare the two channels.
I havent opened it up, so I cannot say anything about the inside.
All in all its quite nice for the price.