hi @Luc-Wijdeveld
welcome to the excellence that is MRA, well perhaps an exaggeration, it has it's flaws but doesn't everything, learn by your mistakes when planning a route. there a few golden rules you must stick to, otherwise your beautifully planned route will have you going down closed roads back and forward along motorways etc etc.
there are some who enjoy deprecating the app, do not pay attention to them, there are those who will mention OsmAnd in every thread possible, MEH! take the advice of the route experts and all the other good advice on here. some of it will work for you others may not.
my Xt has not seen daylight for over 2 years, i used an oukitel RT3 tablet without issue on many mutli day trips, always offline, i have now moved on to a carpuride 702b and not had any issues in around 4 months of use, I am using it on a multi day trip in 2 weeks. sure it will be fine,
if unsure, ask on this forum someone will know the answer, ignore the nay sayers.