Sekowa backferment

Whilst looking to find where I could buy a baneton basket I came across Sekowa Backfermant.  I've dabbled a bit with sourdough so I wonder if anyone has any experience of using the Sekowa and what you thing of it.  I also wondered if you can feed it like a sourdough or whether you make up the starter, which I understand keeps several weeks, then you use small portions of it and I don't knopw if then you have to make up another batch or whether you can keep it topped up by feeding.

I did find a site in the UK for baskets and lots of other bread baking things including the Sekowa  

 www.bakerybits.co.uk

Look forward to reading any comments... thank you

Cynthia