I travel up to 10 times a year and do check Tripadvisor too. However, you can rely on it much. I've stayed in 5-star resorts that had just positive reviews and my experience was absolutely awful and then I stayed at small 3-star resorts with a number of negative reviews and I loved it more than anything. FYI, a lot of resorts do check Tripadvisor to see where they are at. If they see something they can fix, there's a good chance, it will happen soon. But sometimes they can't do much about "moldy smells, or noises from other guests". Cheers!