nothing wrong with build quality at all the finish on them is great in fact, really well put together, no skimping on materials, far better than suzuki, kawasaki which tend to look very second hand after a few moths if you dont look after them. Reliability is great if you look after them ie decent oil and follow the service intervals (you can quite happily service mostly yourself, just follow the intervals, electrics can be troublesome aparetny, but neither me or my mate had one warrenty claim with 20k between us over a year (his was 1 year old, mine was new, and in a year and 10000 miles, from brand new I lost £650 on mine, thats from new, so I'd class that as pretty good depreciation, I think my mate got back what he paid for his, but he got a pretty good deal in the first place.
I dont know where your getting your facts from but they are wrong. I have no reason to defend the bike I sold it a long time ago and have an R6 now, I just have experience of it, and know first hand having rode the cbr and A Lot of other bikes to boot, it is a very boring a to b bike. I really didnt enjoy riding it at all, and cant think of anything good about it really, apart from the fact that it is probably cheap to run and very reliable. You may as well get a £500 CG125, because that is what you are buying basically, same engine I think isn't it! They are not qualities I look for in a bike, you might be boring and want that and if so go for it.