Battery Boosters - the good, the bad and the useless?

[kicker]

I'm in the market for a battery booster and I was wondering if anybody out there had any experience of them. I'll be needing it to start my 2.5 di, so I'm guessing that I'd need at least a 400a unit (though I think that 700a would be better) but the price seem to vay a lot from about £40 to over £200.. So has anyone got any reccommendations?
And any ideas where to get them cheap?

[lee733]

HI ive got a clarke jump start 4000 from machine mart and its been excellent ive start every thing from a mini to 5.5 v8 and there only about £75

[rubber duck]

i had a ford capri that was losing it's charge and had a temperamental starter motor. i suffered the pain for ages then bought one of these

http://cgi.ebay.co.uk/Solar-Panel-12V-B ... dZViewItem



started first time every time after i fitted it.

[Guy88]

I got a draper one. best thing i bourt. saves a lot of hassle. charge while i drive around

[sc_BK]

I had a cheap one off ebay before, about £30 odd. Never actually used it for boosting anything but used the light and 12v socket on it quite a bit, and the battery's now shagged on it