You are correct sbout the EZbolus on the Vibe. One press of the up button will populate the bolus field with the suggested bolus.
The reservoir nominally holds 200U but in reality after priming it is signficantly less. With my old MM522 I used to overfill the reservoir, so that when you loaded it into the pump, the excess insulin would actually fill the tubing. You can do the same with the Vibe, but the pump software "expects" a prime of at least 10U. If you prime any less, you get a "not primed" warning. After loading my cartridge I get a message that it is at 196U, I then have to prime at least 10 U (even if I need less to fill the tubing) so after priming this leaves 186U.
On the positive side, I find that the integration with the Dexcom works well, with good menu systems. The CGM information is accessed by one press of the button on the top of the pump and you can then scroll through the various time frame screens (1, 3, 6, 12 and 24 h) with the up/down buttons. There is also a screen that gives you SG plus IOB which is really useful. Unlike the Veo/530G there is no predictive low BG alert system with the Vibe. You just set a limit value and you can also have it warn you if you have one or two down arrows. I have mine set to warn at 4.4 (80) and one down arrow. In practice this works better than the Medtronic system because the CGM is so much more accurate and reliable. I was always tempted to ignore low BG warning on the MM because they often turned out to be false alarms. I find you ignore the warnings on the Vibe at your peril- they are almost inevitably correct.
I wouldn't agree that most people in Europe don't get access to the technology. It does vary a lot from country to country but in many e.g. Germany, France and Scandinavia, access to pumps is very good. In the UK it has been particularly poor but the situation is improving (e.g. in Scotland, under a new initiative, ALL T1s aged 18 or under will have access to a fully funded pump + supplies if they want one). In the UK, funding for CGM is much more patchy and most people are still self-funding.