Al-ko side lift jack - any good?

Remus

At present the jack we carry around in case of a puncture is a Halfords 2 ton jack.  It does the job perfectly but it is heavy and clunky.  I've been looking around for something a bit lighter and easier to store in the caravan.  What do people think of
the Al-Ko side lift jack?  It's the one where lifting brackets are fixed to pre-drilled holes in an Al-Ko chassis.  My previous experience with jacks of a similar design (not Al-Ko) is not good - I could see the jack beginning to bend as I applied lift - that's
why I got the Halfords jack.  

Your opinions would be appreciated before I splash out £100 +.