The problem with them is that they break down latex. Condoms are made of latex. When you get condoms, make sure that they are made of latex, and not something else. Condoms are available at most drugstores and supermarkets, but if you don't know of any stores that sell them, you can fin d some here . The next thing to think about is what feels the best.
Some people prefer thicker stickier lubricants, and other people prefer liquidy feeling kinds.
There are a lot of water based lubes around. Astroglide and Wet are also really popular. These are the three that I suggest, because I know for a fact that they are water based and because a lot of people prefer them. There are a lot of others around, and my best advice is to carefully read the bottles, and if you have questions, don't be shy about asking your pharmacist or doctor. Whatever you decide to do, remember to use a condom and a water based lube every single time.