Anyone tried one of these? Reviews vary on Amazon, it's just that there is one for sale in local rag... thought I'd see if it is any good. [[http://www.amazon.co.uk/dp/B00261X9GI/ref=asc_df_B00261X9GI3064621?smid=A3ELFFJYTPO92M&tag=googlecouk06-21&linkCode=asn&creative=22218&creativeASIN=B00261X9GI Like this...]]