The questions were pretty standard. The interviewers were professional. The company culture is very casual. It is definitely not the type of interview that you want to wear a suit to; you will stick out like a sore thumb if you do, and not in a good way. There will probably be minimal HR involvement in your hiring process. If you haven't heard anything relatively soon you may need to call and check on your application. You will also need to take a behavioral test before having your application passed on so make sure you take it.