I have one, lemme give you some pros and cons:

Pros:
i) The GB is smooth and gear change is very slick (no/minimum rubbery feel)
ii) Power is more than enough for me, acceleration feels good, only gear 1 feels slightly heavy (heavy car)
iii) RPM at 110 km/h ~ 2700; 120 km/h ~ 3000
iv) The clutch feels good, bite is good, very hard to almost impossible mati enjin.
v) Fuel consumption is great considering it's a C-seg (Town~8-9 l/100km; Hway~5-6.5 l/100km)
    (I went Seremban -> Cameron (Uphill + Jam + Jalan2) -> Penang Island in one full tank -- 7.8 l/100km average)
vi) It will easily maintain a high speed for highway crusing (>160 km/h)
vii) No CVT whine or any noises from the GB at all   

Cons:
i) Proton QC (Front doors have minor plastic rattle, seat bunyi, and some other random cheap plastic sounds)
ii) Already in SC 3 times for because sometimes the car susah nak start 
iii) Proton customer service 
iv) Radio reception a lil' bit fragile

Overall, still have my doubts since my car is just 4 months old and already 3 times in SC, but driving it feels good. I'm just glad that I didn't take the Iriz instead     

For the QC issue, I think it depends on your luck with Proton. My uncle's Iriz rattles like hell. Meanwhile, my rattles are barely audible (I have stupidly good hearing, everyone else says there are no rattles when tumpang my car). Oh the seat squeaky sound they settled for me though, now all good

For the susah start issue, I honestly don't know, it doesn't happen every time, maybe once a week, or even more, but when it happens, the just won't start for a minute or so, I normally will lepak for a while and try again, should work. Already sent to proton 3 times, better now

Today my ESC light suddenly came on during driving, normal road, 80 km/hr and baru one week plus after my 10k service. After off and on engine, light gone, sigh.

My car is 4 months old...Proton quality is really not the best