A friendly welcome from the lady whose grandfather (if I remember correctly) converted this farm into B&B apartments/rooms, set in lovely gardens (with ponds, an aviary, a plunge pool, a terrace, a barbecue... and probably more!). Unfortunately we hadn't had time to learn much Portuguese, but luckily Margarita spoke good English.
Our apartment was really nice - spacious, cool, comfortable and well-equipped, with a handy kitchenette. Breakfast was served in a kind of marquee in the gardens (heated, as the March mornings were cool), and included a good selection of bread, pastries, cereals, cold meat, yogurt, coffee, tea, and freshly-squeezed orange juice, from the Quinta's own orange trees. We also had eggs on the first morning, which we think were probably from the hens we saw in the grounds.
Despite the things that have sprung up around the Quinta - it is wedged between a railway line/station and a road - we had quite a peaceful stay... there was some noise from the road and from trains coming and going, but it was less intrusive than you might expect - in fact it adds to the kind of 'oasis' feeling of the place, and I say this as a light sleeper... I think the only things that woke me up were the birds and the frogs getting quite vocal in the morning!
The only other aspect which may not suit some people is the location in relation to the town centre. The setting is obviously very handy if you're arriving into (or leaving) Tavira by train, but it's a bit more of a walk (perhaps 15 mins) from the bus station, and maybe 10 mins or so walk into town, although we quite enjoyed that. There's a Lidl supermarket just next to the station, and one or two cafes just a few minutes' walk away.
Incidentally, we really enjoyed our meals at Restaurante Bica, just across the old bridge in the centre of town (a street back or so), but careful, it seems very popular and fills up quickly.
Overall, we found both Quinta do Caracol and the town of Tavira very likeable indeed.