Yes, I got mine in May and it has V55 and I have had no issues with the car at all.....however, I noted that the iSmart app was telling me a load of rubbish i.e. the interior temp was -10 etc etc so after many messages to and from from MG Europe via the iSmart app they asked me to ask my dealer (MG Lincoln) to reset the "T-Box" which they did a couple of weeks ago. I booked for a Saturday morning and they did the reset, however the Technician then showed me his laptop and there were 12 or so outdated software modules within the car. He said they needed to book it in for a day. Yesterday the car went in and everything was updated, he said it took 5h - and the software V is still 55 by the way. I can also say the car is better in so far as the screens are faster and the wireless car play (I use an adapter) is almost instant now. I never had any issues with traffic signs, cruise or anything, and still don't appear to after yesterday.
The only thing they could not do is update the navigation map. I have tried with the USB but just get an error. MG Lincoln said the same thing and promised to get me a solution and call me, and so far I have no reason to doubt them, they have been very helpful. One thing I did read is that the USB needs to be 32Gig so for £6 I have ordered one to satisfy my curiosity.