Open relationship is never will be a problem as long as you are really love each other sincerely and you trust each other because in long distance relationship you needed put big afford on it and you just really needed to deal with everything very carefully and since you already do all that things you will be just fine and okay with everything.
I mean i am can't be sure with everything because every people have a different way to deal with an open relationship because i was having a bad experience with it but from that bad experience i learned about everything i said above because i know how its feel at first time when you trying to be an open relationship.
So i comes with conclusion about open relationship is that you needed put big afford,big trust and having big heart for everything in your way to be in this open relationship and you need to be ready to handle everything carefully because like i said before open relationship isnt easy for a person who is the first time on it.