Michael, I'm curious, can you see this oven before you buy it, or would this be an online purchase? If purchased online, are you getting this from a company you can return it to if there is a problem?
The reason I ask is that, even if you're okay with a theoretical 6 minute bake, I still have concerns about the build quality. They could follow all the published specs to a T, but, something like the sheet metal could be tissue paper or the insulation could be present, but only 1/4" thick. The price for this oven is so incredibly low that I can't help but wonder if there's a reason why it's low- it feels a little too good to be true.
Right now, I think Italian and Swedish ovens have a better rep, but, there's no guarantees whatever country an oven comes from. Indian ovens, for instance, are no more likely to have quality builds than Chinese ovens. To be honest, the Chinese make some pretty cheap ovens, but they also have a pretty long track record (for some brands/models). I'm not head over heels for Chinese ovens, but, if presented with a Chinese or an Indian oven at the same price, I'd probably go with the Chinese. The operating words, of course are the 'same price.' I think you'd be hard pressed to find a Chinese oven with these specs for $320.
These specs kind of match up, watt wise, with the Chinese 'Sage' brand ovens, and the Sage ovens have some happy forum customers. This size, though, for Sage, would most likely be $900 minimum.
I'd really like to see you buy this from somewhere with a return policy, but even if you can't secure that... $320 is a really good price. There are grill accessories here in the U.S. that will run you more than that.
Are you handy? Sometimes these ovens require a little tweaking- nothing major- maybe adding some insulation or things like that. The 6.5" height is a little high. You probably will need to raise the floor a bit. As I said, though, nothing major.
Have you checked the electricity requirements and can you handle them, either with your existing circuitry or with help from an electrician?
You never know, you might get a 4 or maybe even a 3 minute pie from this. People get those times from a Sage oven, and, as I said, the specs are not that different.
Long story short, I'm not saying buy it, nor am I saying don't buy it, but, with that price tag, I'm definitely leaning pretty heavily towards buy it. It's a risk, though.