the best way to judge it would be to see up and running, however i doubt aldi would actually have one on display, as you say the returns policy seems to be good. could be worth a punt and if it turns out crap take it back.
I'm thinking of getting one myself but it doesn't say what the panel resolution is so i will have to check that in the shop but i guess it is 1366x768 and not really 1080i but 720p will do for the 360.
Well, I got there early and got one. Bloody heavy to get home (on the bus!).
First impressions: It looks fairly cheap, only to be expected I guess, but not really a problem (I may cover up the Tevion silver logo with a bit of black tape!). I was really worried when I went through the auto-setup procedure and started watching on the internal digital receiver. The picture was pretty bad and there was a very noticeable sync problem with audio and picture, ranging from small to huge, but always there.
I was about to re-box it and struggle back to Aldi's when I thought about trying my old freeview box. Connected by scart, made sure the settings on box and TV were compatible, and, lo, a perfect picture and properly synced sound. I assume that they have cut costs by putting in a cheap (ie useless) digital tuner.
I'm now very happy, and glad that I have a 3-year full labour and parts warranty (including a pick-up and delivery service) - that's what swung it for me in the end.
Have a samsung 32" r87 and its the mutts nuts, takes a bit of tweaking for your own pic requirements but loads of settings to achieve it, 3 hdmi, component, 2 scart and optical out..all for £499 (£469 current) from costco with 3 year cover, although i think you can get it even cheaper on the net. Started off with a tevion 32" a couple of years ago, there was a mega thread about it on here as it had a lot of issues and although pic was good it didnt do exactly what it said on the tin.