Milan is not bad either The Zehnder is a bit quieter and very easy for a layperson to maintain. The replacement filters are also very inexpensive over the internet.
Yes, it is possible and always very individual. The thing with the humidity is a tricky matter. You have the option to retrofit the heat exchanger with humidity recovery if needed. Many of my customers managed without it. In my current house, I also retrofitted it; before, I had 27%
Had read that an enthalpy exchanger only works if enough moisture is generated. We are a household of 3 people, the house is unoccupied during the day.
Well, if there is no moisture to recover, then nothing can come of it. But the experiences are consistently positive. I believe I have never read anything negative about it, nor heard of a builder complaining.