How much is it mrjallen on average ? Usually comes in 3 kg. cartons. Supermarket brands are slightly cheaper and probably the same spec./or slightly less. Remember all supermarket brands are cheaper for a reason; but still does a decent job.
Don't get the Tesco one though .. doesn't dissolve well and finish up with little white specs which show up on dark colours.
We sell one at work for professional launderers and is top spec. but not sure if would work out cheaper even on a staff sale, and another big problem is, you have to buy 25 kilos minimum
.. would last you 12 months (depending how often you wash your clothes of course :-)) .. curious just to make a comparison for you.