Guys, guys... what is wrong with all of you... especially Steffen...
I have held back so far but now enough is enough.
: You are not the measure of all things here. Maybe 3% of the German population are in your situation. With your attitude, it's probably rather 0.3% of the population.
You might know that with your attitude you would be better off in other countries (see UK/DK).
It should also be clear to everyone that Germans even tend towards absolute debt relief (beyond the economically sensible level).
But offering financing at this interest rate level with 1% is negligent and irresponsible. It is already difficult to calculate (estimate) the interest rates for 10 years in advance, but with 1% repayment, basically nothing is repaid after 20 or 25 years. By then, however, one has gotten used to the available income.
To bring the point back... you should choose a repayment rate of at least 2%, preferably even 2.5%.
A conscientious advisor should orient himself to a minimum of 5% annuity. You are currently at 3.5%!
Prepayments or not... not even one in five people in Germany use them!