17 minutes for me. I do them fairly often and have a ritual. While I'm looking for the edge pieces I sort the ones with an outie on the top to the left side and the innies on the right. It narrows the search later. Thanks for calling our attention to the cute tumbling blocks picture.
Btw, you can upload your quilt pictures to become puzzles. I haven't done it, but that's where all of the pictures come from - users sharing. If anyone contributes one, please let us know!