If you take it out, scarring depends on how long you keep the piercing. If you take it out before it heals, it shouldn't leave a scar at all. If you leave in it for months or longer, the scar will be a tiny dot. I had my monroe done and took it out after about 8 months and I have a tiny dot of a scar there. Doesn't bother me at all.
i have my lip pierced on the left side and I LOVE it. its completely up to you. its not painful at all and its super quick. if I take mine out I have NO scar that's noticeable but it all depends on how much you scar. good luck