Hi John,
Cant help on 3008 but I’ve just got a 5008 GT Line Premium last Monday as it’s a great car. My last 2 cars have been Peugeot’s, one nearly new and the last one new and I’ve not had any issues with either over 12 years. The 5008 is basically just a bigger version of 3008.
Go and test one if you can, I think you’ll love it!