Hi, they had a similar kit recently for £50/£60 (actually I think that was a 60 dish) but £99 probably isn't too bad if it includes everything. I have no experience of either this dish or the receiver. I think (and I could be wrong) that there might not be patches available for that receiver. For real free-to-air TV this is not a problem.
It's 90cm so even though you don't say where you're located I'd imagine you'd be okay for Hotbird. In southern England I can get the RAIs, the French and German channels easily on a 45cm square-ish dish and a 40cm oval dish (behind glass!).
All signals are analogue, so there's no such thing as a digital dish (even though I have a dish called DigiDish45!). But you're right, the box pieces together the ones and zeros and sends them on to your TV in analogue - and yes, you either get a picture or don't.
With a dish that size you can add extra LNBs (box at the end of the dish arm) and pick up Astra 1 (old "
Sky" satellites), Hotbird, Astra 2/Eurobird ("
Sky Digital") and with a bit of work Eutelsat 16 east. (Depending where you are of course). That's a whole lot of European TV!