I picked up a 9 month old Dell VP8 for ?130 recently and it's a good buy, but I must admit I didn't realise it doesn't have GPS and it is the perfect size for a sat nav screen so that's a bit of a let down. Of course that might not be important to you.
Overall it seems well built and I like it because you basically get the full desktop version of Windows like you do on a desktop or laptop, and of course the Metro interface too so you get the best of both worlds on a tablet.
I personally like the Windows Start button on the top left side, it makes a lot more sense to me than placing it beneath the screen as on most tablets. You will find it is a much more natural place for your finger to find, but you will probably use the onscreen one on the right of the screen mostly anyway.
Am I happy with it? That's a tricky one because I came from a 10.1" Sony Tablet Z and I am finding it harder to get used to the smaller screen than I thought I would, and the lower resolution. Technically I can't really fault it, it's quick enough and it's good to use but it's more of a disappointment than I expected it to be not having a full 1080p HD screen and because of that there is a tinge of regret, but again that might not be an issue for you.
I miss the onscreen keyboard that Windows Phone has, which is fantastic on the Lumia 930. You can download the TouchPal swipe keyboard (free) but it's nowhere near as good, and the Android version worked much better. Alternatively you can buy a Bluetooth keyboard for around ?25 but I can see myself reaching for my laptop if I need to type anything more than the odd sentence.
I wanted to switch to a Windows tablet from Android but I have to admit I used the Sony all the time, but don't feel that I want to pick up the Dell so often and I am already considering switching to a Nokia 2520 if I can find one at the right price. I can't deny that it's easier in the hand than the 10 inch Sony but if you have already owned a 10 inch tablet before you might feel that it is a step backwards. To be fair, the Sony is a more expensive tablet.