I own one of the first Vintage G212's, before the "Celestion" logo was added. To start any HB review, you should know already that any product Thomann sells under their own brand is a product you can trust. The quality is absolutely amazing and you don't have to pay for the middle man. The customer service is the best in the world and you should not be worried about ordering it.
I bought this for home use, right now a Carvin X100b series III (carpet) is plugged into it. The speakers bought seperately without this cab would cost more than the cab itself! As You probably know, the Celestion Vintage 30 is pretty much the standard for rock and blues music, being featured in many famous cabs and combos, including the famous Marshall Silver Jubilees. This is a great way to get into some of that magic on the cheap. Buy a Harley Benton Cab, and use the savings for a better head than what you're planning to get.
The sound is very well balanced, with the lows sounding natural and note definition being clear, mids coming through nicely (or not if you tone them down) and the highs being able to almost get a "buzzsaw" tone. It reacts very well to guitar swaps and any character coming from the instrument shines through very well both clean and distorted. It does everything you could ever want it to. What can I say. It's a guitar cab with two great speakers that just... works. I've been using it non-stop for 5 years almost daily for hours without any problems. If the name bothers you, the logo is easy to take off. I wouldn't however - be proud of how smart you are with your money and ears!
It is, like most cabs, pretty heavy, and if you want to take it gigging, it'd be wise to make sure you have someone available to help you unload it and set it up. With a standard Marshall-sized tube head it weighs enough to not be possible to lift it alone.
In the end, this is a great cab for very little compared to so called "brand" ones with absolutely no flaws in the worksmanship and gives you tone you just can't improve on... provided you have a good head, of course.