ReviewExch.cx is a very cool, simple and easy to use swap exchange, if the coins you want to swap is on their list of supported coins, i don't see a reason not to use it: They don't collect kyc, they don't aggregate utxo's for LTC and BTC, they don't cooperate with LE, they also don't log ip addresses, good for privacy and can even stand in as a 'makeshift mixer' etc. Take note anyway that you lose control of your coins during the swapping process, as it isn't a non custodial service, but that is the same risk majority of crypto users bear when they use centralized exchanges, mixers and other centralized services.
One thing that's great about eXch is its simplicity, it is newbie-friendly and even a crypto newbie would not have a problem using this service, i swapped my dash for Litecoin for the purpose of this review:

So you just input all the necessary info, and you can either click on 'calculate' to see the amount you will be receiving based on the current exchange rates of the coins you want to swap and the service fee (1% for flat rate and 0.5 for dynamic rate), or you can just directly start exchanging without calculating and you'll see the rates on your receipt. Take note that refund address is optional, but if there is any need for a refund it will be sent back to your sending address, so for better privacy, add a refund address. Before swapping it is good to check what eXch has in their reserves, and if they have enough of the coins you want.

Once you click 'exchange', your order is created with the unique address you should send your coins to, once sent and received by eXch, you will get the coins you swapped to immediately. It is fast and easy, downloading your signed letter of guarantee is also important as it contains all the details of the swap and can be used as proof in cases of disputes. It is to eXch's advantage that they have kept their site very simple, it is very difficult to make a mistake and easy to get your swap done in minutes. Cheers guys!