I attended a wedding at this venue and stayed for several days.
The location is good, the building and grounds are also very pleasant. The facilities for the wedding ceremony and reception were both excellent, well organised and nicely presented.

Having said this, when we first checked in, we received our keys and went to our allotted room. Which was in the old block and clearly was originally servants quarters in the roof. We stayed in it for about 15minutes before returning to reception and wanting a room change. We had to pay for the upgrade and all they had available was the second bridal suite. This was in the new block, and these rooms are spacious, well layed out and pleasant. Although the decor in this room was a little odd, with aged white furniture, I can't complain about the comfort.

The hotel has a nice warm pool, hot tub and other leisure facilities. The bar was comfortable and reasonably priced, given its a hotel bar. Very nicely done, although the layout of the old block could have been better.

I'd happily return here for a couple of days. Having said that, winterbourne is not very local to anywhere, and if your planning on travelling in the area a car would be necessary.
Possibly a hotel more suited to hosting events, than using as a base for visiting the area.