that kit is a total rip off..
it consists off a cheap timing belt kit. contitech.. not poor quality but not as good or trusted as some other names like GATES which are OE on most all cars today.
the water pump with metal impeller can be picked up for less than £25.
that timing belt kit can be picked up for around £65-70 maybe less. (gates around £90)
no need to change the thermostat? never known anybody to include this in a cambelt change. and as for the cam and crankshaft seals you dont even touch them if your doing this and if they arnt leaking. you dont even need to remove he pulleys so why make the job even harder. i havnt heard of many crank/cam oil seals going on these engines but then if you are going to change the pulleys etc and feel you want to change the seals which i know they dont do on a normal cam belt change ever. you could order them from the dealers.
the parts for decent quality will come to around £100-120 depending on if you get discount and where you buy from.
cambelt is easy to do. the mark for the crank pulley is on the metal cover held on by 10mm. so you have to remove the belt. put the new belt on and put the bottom metal cover on to line up the crank. there is only 1 camshaft pulley as the other pulley is chain driven. leave the engine mount on (remove the bolts) just work around it by jacking the engine up safely that mount is a nightmare to remove and sometimes just wont come out.
just use the timing marks you cant go wrong. spin the engine over by hand and make sure the marks line back up. watch the tensioner as you just pull the pin and it applys tension, the belt is normally tight to put on anyway so you can turn it over and make sure you have correct timing marks before applying the tension as you will have to then remove the tensioner and try and push the pin back down again in a vice which i wouldnt like to do myself.
get a good
guide from a program like autodata, ati vivid workshop or of course elsawin the seat manual.