They'll eat it if it's well made, but as mentioned, is more likely to have mouldy patches than wheat or barley straw. It has higher protein but less energy than cereal straw. To me, it's too coarse for effective bedding.
At £1.20 a bale it's not particularly cheap as you'll find the bales are extremely light, so weight for weight it probably works out the same as other straws.
But having said that, I wouldn't totally discount it. It's worth trying a few bales to throw in to your sheep for a change. But it's really too low in energy to use as the main fibre source for pregnant ewes unless you are feeding them something with a high ME to go with it.