GSK Senior Scientist - interview questions

Pretty much STAR format, mostly behavioral and straight forward questions: How do you deal with a challenging situation or a hard one to work person etc. people were super friendly and was interviewed in 5 rounds of 1-3 people. Something shady about the company was they were suspicious and even had difficult time to enter from entrance.. one more ethical thing that I did not like about them was: they promised to refund whatever out of pocket costs. I trusted them and filed the expenses for my trip but they never reimbursed the amount!