One handling company/ one fuel provider and You will HAVE to pay cash only the terminal fees (ca 150 eur for LJ60 it was, and they were happy to take Euros and give back local LEI :-D ), handling/apt fees You can pay by CC.
Sleep only in Delta 4, which is not 4* but is the only one You can walk in. The catering You can take also from Delta 4 and from there only, even handler takes from there and advised our FA to take directly as she could see what she is ordering.
Narrow runway and lots of concrete-asphalt "connectors" in between and some minor holes filled by asphalt... Not the best for trolley lear wheels but Falcon-styled should not feel worst than anywhere in Russia.
Nice people though everywhere...