To be honest its worth the stress, its easier on the Polo E Models as there is a hole in the VW door wiring for models with vacuum central locking, if you use ethernet cable its a bit more simple as the wiring that comes with it is week and would recommend always soldiering.
Also getting your key cut is a bit of a pain, but i found a place on eBay doing key cuts, but you would need a spare key to send to them, or cut your old key and put your chip inside the casing, which is what my dad did.
But at the moment i haven't got it in, as mostly its just me in the car when we have mates in the car i just say 'Push down the thingy"
I had to rewire my car the other day and i got angry! :L
But also i have a funny feeling you only have to wire in 2 wires to get it to work, (theres 4 in total)
Hope this helps, sorry for my poor english!
