The corners in the majority of the rooms are cracking, as I looked closer I realized I could see the tape, so the previous owners did a terrible job taping (not the only terrible, stupid thing they did, if this was the biggest issue theyve caused, id be happy) so i decided I was going to fix the issue. I have only done one closet so far & figured I would strictly do closets until I got better & move onto the rooms. I've watched a pro do it a few times & watched you tube videos as well. Any advice & can you tell me how I can tell if I'm doing a good job. When I finished my first corner, I told myself that as long as my job looked better than before I was good, but I want to ensure I get better over time. Thanks.