I should have been warned. I should have looked around before ordering. The maitre d' (or the owner?) is Indian. All guests, apart from us were Indian. Couldn't see their chef but would bet dollars against doughnuts that he or she was not Thai.
Their menu is as long as the holy bible and it looks really spectacular. The waiter was very attentive, friendly and competent. The drinks came very quickly. Unfortunately, the red has already joined the vinegar club but house white was ok. We decided to go for mixed starters and sea food for main.
Starters turned out to be all deep fried spring roll like things which have clearly traveled from China without a stopover in Bangkok. The dip - a mix of coconut and lime - was nice but lacking flavour.
Then came the main courses. We expected the usual. Explosion of herbal flavours, the spiciness and lightnes of Thai cuisine. Instead, we got fairly bland stir-fried pulp or almost blended (not mixed) calamari, shrimp and fish along with a couple of prawns floating in a translucent, tasteless gravy.
It was not Thai, nor Chinese nor Indian. My suspicion was that an Indian-Chinese couple decided to start a restaurant in Nairobi but could not agree on a style so created a hybrid monster.
If you don't expect the real thing, you may not be disappointed. It is quick, friendly, clean and reasonably priced. But don't choose Siam Thai if you are in a mood for Thai food.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.