Thank you Astra, you did not give me any offence. I am not trashing any other cover and it is down to personal taste. I have used my 650 now for over two weeks and wanted some urgent protection for it. My local Sony Centre do not have the 650 covers in stock and could not give me any stock dates. I went for the Navitech based on many positive reviews of the product at Amazon UK and for the cost, it was worth a try what with the returns policy under distance selling regs etc. I am glad I did based on my initial post/review.
OutaDaDark, No it's not too tight, fits fine, in fact I slipped a very small piece of foam inside on the spine and now alround it holds it solidly in place without any bulges or other glitches.
Many thanks to all forum members, for without your contributions and knowledge I would not have purchased my Sony and have entered the world of ereaders.