Pros
Travel, keeping the points for hotels, car rentals and flights. The smiles on peoples faces when you fix their problem and leave happy
Cons
You wont have much of a social life being in hotel rooms Monday through Friday and unless you seriously monitor your lifestyle it is resoundingly easy to dip into a poor state of mental and psychical health, which does happen among colleagues (sudden heart attacks, etc.) There is a 100% chance you will be exploited for any number of reasons, often just because you are already on site at the customer so "could you do this as well?" even though you are not trained on the task and that is not your job description, and they know. You will end up wearing a huge amount of hats that you aren't qualified for and getting paid the same for the extra effort, clear exploitation. Generally unsafe for anyone who is too kind to say no. Don't feed the ducks