The great thing about BWDs is that they almost always have a nice,bright,display.Good choice of a CRT,I guess.
The two bad things about a BWD are:
(1) Many of them lose their triggering when they get old.
There is a voltage divider at the output of the vert amp,right up near where it drives the vert plates.This supplies a small level of vertical signal to the triggering circuit.
The high value resistor in the divider goes even higher in resistance with age,until this signal level is insufficient for reliable triggering.
This brings me to bad thing (2)
They are very difficult to troubleshoot,as the boards are tucked away under the tube,limiting access.
If it is working OK,it is a very useful 'scope for most general work,really a step up from the "cheapy" 10MHz Chinese analogs.