Allotments 4 All

Rather than muscle in one someone elses thread; here's a slightly different question...

Do any of you have success with sweet potatoes from supermarket potato slips?

In otherwards, are they just as good in the UK, as the expensive slips from the catalogues?...

What are peoples views?

mat

Whilst not being able to contribute, I would like to declare my interest, and if 'supermarket' slips are effective, how are they best made?