First of all, seam allowances can be just as accurate as they are with a sewing machine, depending on the user. 2nd, one big advantage is that you never have to change a bobbin or worry it'll run out. You don't have to use 4 threads, you can do 3. Nancy Zieman plus many others have you tubes and other videos on how to do this. Nancy Z also has a great book on it as well. I've done runners, small and twin size quilts all on my serger. so yes, it can be done. check out the online documentation that is out there. Good luck.