If baled correctly they do make a tight bale. Feed is a lot nicer as it isn"t beat up like a square bale. Straw is excellent and can be just unrolled. They are a different machine to run and it takes some getting used to. Like said before they can be labor intensive, but there are bale loaders out that that work too. Square bales have the feeding advantage if your just "throwing three flakes in the feeder". But I do think cattle waste less because they cannot pull flakes out of the feeder. I would go to a show and see one run and handle a few bales first and see if it suits your fancy.
If binder twine is not available in your area, one can use 16000ft baler twine. A different twine box construction is needed then, I have seen 5 gallon pails work.