I bought this box this week and i'm happy enough with it. Took me a couple of days to get everything setup how I like it, but that's purely down too not using a community build and doing it all myself (If you prefer community builds, I believe the iPab image is quite popular which is based on OpenVix).
I guess really it comes down too what you want to do with it though. I can't honestly say I prefer it more than my previous zgemma box, but I use it too watch TV and stream upstairs. I don't really push the limits of the hardware so I can't say it's any better than an even cheaper box for me at least. Of course once we start getting some 4k channels on cable, and assuming you have a 4k TV then it's a good and relatively cheap 4K setup, however that's more of a positive for 4k boxes in general rather than this particular one.
I'll be honest, if you're just watching TV from sat or cable then there's no need to go expensive. You're not going too see much, if any benefit between a zgemma and a Vu box. For the most part, it comes down to the software, and not even Openvix vs OpenAtv, once again if your just watching TV, both operating systems are relatively similar. It comes down to the plugins and the settings you configure. Lets face it, it's the stuff layered on top of the O/S's which we interact with on a regular basis, the box itself and even the O/S are just the underlying vehicle.
For me, I spent 2 days just installing any plugins I could remember having on my zgemma and setting up the config & skin to also be like my zgemma (which was using woosh - I kinda wish woosh would publish a log of what he's added/changed on top of ATV just so I know exactly what's been done). Apart from having a different looking box beneath my TV and a new remote, I can honestly say i've not noticed it's a different box at all.
Having said all that, the nice thing about VU boxes in general are that whilst you are paying for a top brand product (and the premium that goes with the name), you do also get a solid device. Official openvix support, dedicated support forum, top quality hardware (and this thing does have double the CPU & memory of most other boxes on the market, which is nice to have should I wish to expand my uses for it).
As far as oscam goes, I wouldn't worry. There's a thread on here somewhere containing the files you need for that. Just throw the provided files in the corrcet directory and add your line and your done (I don't consider myself an expert by any means, and it was simple enough). There is I beleive a version of mgcam compiled for ARM chipsets, but honestly I wouldn't bother, oscam is actively maintained and developed, and it's really not difficult to get running.
I hope that all makes sense and is useful too someone. If there was one conclusion I would draw though it's that if you're just looking for something to watch some TV, this is a decent box, it doesn't have the bells & whistles like front lcd displays but it's a safe bet, you won't be disappointed as long as your not expecting to notice some huge difference between this and another box. If you want to spend as little as possible however, you'd be just as happy with a zgemma or similar cheaper box.