There are many, many types of lasers available when one is offering these services. Not every laser has the same capability. Some are more effective than others. Not all lasers will remove the hair permanently and much, if not all, of the hair will grow back over time.
Unfortunately for the consumer this is not easy to determine. When one is considering where to get the procedure done, it is important to know something about the business offering the service, the type of laser being used, and about the training of the technician doing the service.
Price should not be the only deciding factor when choosing laser hair removal treatment. Because results vary widely you may end up paying more in the long run from a place that initially seemed like such a bargain.