The Thistle was exactly what we needed for our one night stay at Heathrow for a morning flight the next day.
-It has the pod service to Heathrow Terminal 5, which you can use for only £6 each. It was fast, easy, and super convenient.
-The room was very clean.
-The wifi is fast.
-There is AC in the room.
-There are a couple of pub options close by for an easy dinner and there is a restaurant on site (though we didn't try the restaurant).
-It was a great price (under £100 for the night).
-The property itself is extremely tired and could use a renovation. When I first saw it, I thought it looked more like some sort of guarded facility - a bit scary to be honest!
-The furniture in the room was also tired and old, but at least the bed was comfortable and the bed linens were nice.
-There are no added amenities - anything extra will cost you. The only "extra" items in the room were a kettle and mugs along with an iron and ironing board.
Bottom line: For the price and for a one-night stay to be nice and close to Terminal 5 at Heathrow, this is a good option.