I take it the 6 months is an example rather than from experience, these bikes haven't been around long enough to know. But I take your point.
I spoke to a lady today who had a Giant Lithium powered bike, a very dissapointed and unhappy lady. When she bought her bike less than a year ago she was told the batteries were about £150 and would last about 3-4 years. She has noticed a marked decrease in the range she can now travel, and has been quoted around £350 for a replacement. Her friend bought a different make at around the same time which is still going strong- unfortunately she didn't know the make ;o( She said she would never buy another Giant, she didn't like the pedal assist mode only, her friends has powered as an option. Shame she didn't know the make, but it shows even the big names aren't always the best (although I think the dealer hasn't looked at her needs properly either- a local dealer who I will now avoid).
I think my head is nearly full to bursting now, I'll let everything swill around waiting for my flat to sell then decide. I'll continue to look for the bikes and talk to the owners for their experiences when I get the chance (I missed the chance to talk to someone who had a rear hub powered bike today, I couldn't stop).
So thanks for all your help in this subject, I will buy a powered bike, I have more defined knowledge and a better understanding of what shoould meet my needs, and I thank you for your guidance (and patience) through this journey. You may not have heard the last of my questions though- there always seems to be more to find out the more you know, but I really appreciate everything you have done for me.
By the way I'd also like to say of all the dealers I have been asking questions the most consistent in giving help, answering *all* questions quickly is the ebay seller scotswhahae2005 (the Synergie bikes), better than the dealers. Nothing has been too much trouble for them, and I would certainly have confidence in their support with any issues when pre-sales have been handled so well. Their feedback is excellent, and where issues have been mentioned they appear to have always sorted them out quickly. The peak power figure for the bike is good, price is good, weight good, and it even has mudguards and a rack- it looks like it may well be the one after the thoughts, facts, figures, dealer help/responses have bounced around my head for a while.