Dual masses are a headache to me!
Two family members have vag cars with dual mass, and both failed/worn to the point the car was undrivable within 2years from new.
Apart from that they’ve been great, though if you base 5years worth of driving from new vs. a 2.0gti. the GTI was way cheaper to own.
Held its value better (£21.5k new, £11.8k trade in after 47k/ 4yrs), cost less to service (about £80 on average), tax was more which negged that out, and MPG was similar 42-44 for the gti, and 46-48 for the GT170
But it was resale value of the GT170 that killed the dream, think he got about £7k on a £19/20k car after 4yrs with similar usage.