The main problem I encountered was that when you pull the sail into the snuffer all of the patches are pulled together, forming a big ball of sail at the mouth of your snuffer.
Currently, I am using a system with an additional line going from the patch to the retrieval line (see attachement). In this way all the patches do not collapse to a single point and the sail remains a little bit more stretched out, which makes it easier to pull it into the snuffer. Works well for me. The overall length of the spinnaker in the snuffer increases, however.