We spent three nights at Esther's apartment during Oktoberfest this year. The apartment is in a central location very close to the city center and was conveniently located from the Oktoberfest ground too.
I haven't rented an apartment in the past (have mostly stayed in hotels, BnBs and hostels), but the hospitality we received was beyond what I expected. With the Oktoberfest mayhem, we lost out way back to the apartment and got really late for our onward journey. She escorted us till the train station (for a train at 11PM) so we don't get lost and miss our train!!
Added benefit - the coffee and tea selection!!
Big thumbs up and highly recommended!