I have a Skoda octavia vrs 2.0pd. Its on 120,000 and touch wood still going strong. I have had it remapped for the last 30,000 miles but 90% of the miles are motorways at a steady 80mph.
The things to watch out for are...
1) DPF, they go on all high milage diesels around 70-100k. Have it smashed out and the sensors mapped and never worry about it again. I've passed 2 MOTS since mine was removed. Car revs better as well.
2) Injectors are known weak point on the 2.0pd VAG engines. Skoda replaced all of mine FOC, no issue, £3000 worth of work done on a mapped car(didn't tell em) 4 years out of warranty. Audi apparently refuse to do it, vw fight it and seat are unknown to me as to how they handle the crappy injector. VOSA are well aware as are the owner forums..briskoda etc.
3) ABS sensors can apparantly go, not for me touch wood but £300 fix for stronger stuff is the way to go I hear. Again car forums and Google will tell you more.
I adore my VRS, has a huuuge boot (4 sets of golf clubs, camping gear for 3 for a week...suitcases for 4 for a week etc...) leg room for four lads easily, quick enough down the country lanes to make you grin, 46-52 mpg when driven with a bit of motorway care (non map v remapped) and a damn good looking car to boot.
I love love love it!