I just spent a half year driving my mom's 2010 Volvo V70. I think it came with some convenience package because it has a proximity key that you never have to take out of your pocket, but it didn't come with the upgraded wheels or anything like that (not the R-design), nor navigation.
Mileage was mediocre. It was okay for a 3.2 V6 I guess, but at the expense of performance. I'm willing to bet that it gets better mileage than any non-hybrid SUV/crossover that has similar interior volume, but coming from a sedan with a more modern turbocharged and direct injected 4 cylinder engine, it was pretty "meh" for me. If you're willing to just allow the transmission to do its mission in life - to immediately find the highest gear and hold it, acceleration be damned, then gas mileage is fine. IIRC it was rated for something like 28MPG highway, and it can do that easily if you set the cruise control. Has a huge tank (19gal?) and so highway range is really up there. I often found myself using manual mode in hilly city areas, because the retarded transmission would be in too high a gear until floored, and then kick down two gears, one at a time and with a lot of engine noise, and then you were near redline and it was time to kick back up a gear. I learned to just pop shifter to manual mode and drop it one gear so I would be in the meat of the rev range.
No real problems to speak of. Outside of maintenance, the shifter had to be taken apart and cleaned because it wasn't moving smoothly, and the dealer said some crap (maybe food/drink) had spilled into it that they needed to clean out, so it wasn't covered by warranty. It has sprayers to clean the headlights whenever you use the wiper spray, and one of the covers popped off. Dealer popped it back on at no charge (I had found the piece when returning to vehicle). Now, outside of warranty, it might be expensive to fix, because it was an expensive vehicle. I think MSRP was close to $40,000 for the 2010. IMO once an expensive vehicle, always an expensive vehicle.
Comfort is great, with nice leather and seat design/cushions. The interior color on mom's is some cream color so very light and easy to get grimy, but that would be a problem with any light colored leather. I love the stereo system in it - sounds terrific for a stock system!
Now if only Volvo sold the turbo diesel R-design here in the States... then it could have had the performance with even higher mileage. Seriously though. Supposedly the V70 is the third best selling Volvo in the world, but... not only do they NOT sell in the USA (heck Volvo kept the C30 but ditched the V70?), they don't offer the turbo diesel versions. There's the D3 2.0l and D5 2.4l. The 2.0l gets around 58MPG using the wacky European measurements, while the more powerful and larger D5 (202bhp, 310lb/ft) gets around 44MPG. Heck, not only that, but Europeans have the option of manual transmissions in these things! WTF? Imagine a V70... with mid 7s 0-60, manual transmission, stock 18" 40 series wheels/tires and getting fuel mileage like a Prius. Yeah, you can buy them in Europe like that.