Your experience with Rituxan/MabThera infusions?

Does anyone have experience being on Rituximab (Rituxan/MabThera) as DMT for their MS? I have RRMS, will be switching soon from Tecfidera to Rituximab. Kinda nervous about the transition cause I got relapses even while being on Tec. Would love to know what to expect, tips, side effects