I've got a 2014 (facelift) 170 Multiair Sportiva Nav with the TCT gearbox. Nice engine, gearbox fine. Can have it in slushmatic mode or use the paddles to change gear when you want to. Pulls well, except 6th which is more of a cruising gear. Just shift down a gear to overtake.
Reviews don't love the gearbox. I find it fine and shifts well. Pulling away took a little getting used to as it did not seem responsive in normal mode, but you get used to it. I wouldn't say it was bad, just setup for economy / normal driving.
Dynamic mode is very quick to kick down, sharpens throttle response and is much more mental. Pull away much better. Would like to tune the parameters to your liking. Somewhere in between.
Don't like the steering as it is nice and light at slow speeds then gets heavier above 30 ish. Dynamic means it's heavier all the time. Coupe is much better, electric assistance too artificial.
I don't give it the full beans and get 46 on a motorway/ fast a road run (indicated by the computer). If you take it a little easier I've seen nearer 50. I don't drive it for economy. Around town it's nearer 30.
Door handles can snap, in and out. Build quality not brilliant, but not terrible, nothing rattling. Friend had to replace the whole mirror as the temp sensor failed (air con not working because of failure). Usual BS from car makers (all the same) that you can't change modules.
Seats very comfortable. Ride good on 18s, can crash into some small potholes, maybe it needs new dampers.
I like it. Suits me as a town car and comfortable on the motorway, handles well, heating / air con good. Euro 6, so £30 a year vehicle tax.