
One thing about the burst with pre-shot it is easy to push the button and with the silent electronic shutter the only way you know you held the button down too far is the slider turns red. You need to practice in case you are looking to get a once in a lifetime shot, birds at a feeder are not like an Eagle on a branch, they come back quickly.
One thing I wish is I could put the settings on a custom button, say C3 as so far it seems like I have to set three things each time
RAW only
no OVF simulation
Burst Mode
I set it on "My Menu" screen 2 but it still need several clicks to get it. the C1, C2, and C3 are grayed out
Overall it seems to be a nice new feature, but as you say, not very user friendly to activate fast. Maybe there a workaround yet to be discovered, or a firmware update will resolve that.
Another issue is you have to use Canon software at this time to extract the Roll to get to the CR3 files you want, hopefully, eventually you will be able to use other software editors to do that. Once again more steps to get to your CR3 file.
On a scale of 1-10 a 5 for user friendly. The best thing I could see it for is, when your waiting for a bird to fly from a perch, you will get that series of shots, so long as you keep that shutter 1/2 down prior to releasing shutter .