Most 16vs are ten years old by now: thats a lot of time to thrash a hot hatch!
If you want a buyers guide, I can russell one up - but the basics are that its not an inherrently unreliable car, although youre best buying one from an enthusiast. Fortunately, most are owned by enthusiasts. But beware why people are selling them; many will be for sale at 60-70k miles becuse thats when the big bills start to come in. My main advice would be to take your time over buying a 16v and do your research. There is plenty of expertise on this forum.
All credit to the 106 GTi, its a cracking little got hatch, although the 16v is better (to what extent is a moot point) and the Pug will never have the street cred that Group A rally pedigree, fat arches and a bonnet bulge will give you.