I've used it and my pigs munched it up happily
I get whichever dried grass I can as supplies over here are very hit and miss but the piggies seem to like this one and readigrass the best. They aren't so keen on Graze On or Fibre P though.
Bedding wise I think you'd find it gets soggy very quickly but if you clean out frequently it may not be an issue. You might find a product like Dixons Dustless better for bedding.