momondo

Great site, always delivers the cheapest results

Momondo is fast and makes it easy to find the cheapest fares. Definitely the best flight search engine I've used. The hotel search engine could use a bit more development, but overall I'm satisfied with their service.

Stylianos Chatzigiannis found this review useful

Tripadvisor

Good resource, littered with sponsored reviews unfortunately.

Tripadvisor is a good resource for finding info about hotels and customer photos of hotel rooms. However, they do not require any proof of your stay, so the site is filled with many false reviews. As a reader, it can be difficult to make out which reviews are genuine. The holiday apartment rental section also needs to be monitored more closely, as it offers apartments in areas where subletting is illegal (ie. NYC).

Paypal

Easy to make and receive payments

Paypal makes it very easy to pay and receive money for products. I'm glad to see they've reversed their policy on holding funds you receive for up to 10 days.