It has the advantage of preserving many future options and having fairly low rates of serious side effects. However, there are some people who continue to have problems. Preliminary results have been mixed, but limited by trial design. A small study, similar to the design of the one you are looking at showed marked improvement in laboratory markers. A large but somewhat controversial study failed to show a benefit in terms of disease progression, but there were few virologic or immunologic measures and the treatments used and the patiens in the study were an incredibly mixed bag.
Studies offer some pluses and minuses.
You get free drug, frequent news on your lab results, usually work closely with nice people, and may get a new drug that helps. You also have to make frequent trips in, get poked once a month, and accept the randomization choice. There is the intangible of being part of something that is new and may help others. It is an individual decision As your doctor said, even if you want to start therapy, there is no rush. Think it over, talk with people, and make sure you feel ready.