Rahu is a top graded malefic planet, it may give you good results or may cause lots of problems during it’s Mahadasha phase. Though it depends on it’s positioning in the natal chart, if it is afflicted or ill placed in the chart then it will results adversely during Mahadasha phase, whereas good or neutral positioning in the chart may tend to results as per it’s strength or positioning in the chart. So results may vary as per the conditions of it in the chart.
Astrosubhash 