Controlled residential ventilation including basement disadvantages / risks?

Hello,
we plan to install a Zehnder Q350 to ventilate and extract air from our basement as well:
A living area of about 20sqm with underfloor heating (supply air), technical room (exhaust air), storage room (exhaust air), the basement is made of concrete and insulated.
I am aware of the advantages, but I read and hear various statements about the disadvantages and risks (condensation, summer humidity... etc.)

1.- How is it during high summer periods and the risk of bringing extreme humidity into the basement? Is a bypass helpful in this case?
2.- Does an enthalpy heat exchanger have disadvantages here?

I would be very happy about long-term experiences.

Thank you!

Still about the basement wall construction: it is made of precast concrete strength class C 25/30 and 24 cm thick, including 12 cm perimeter insulation with extruded foam boards, I hope that will be suitable.

I wouldn't worry about it in an insulated and heated basement. You have condensation problems where walls are significantly colder than the indoor air.