Is cheap CAD software really effective

Generally the CAD software may be of 2D or 3D. There are some software, mainly 2D which are  cheap CAD software , because their cost is very much less compared with their counterparts. These days, 3D cheap CAD software is also available. Surely there have been a lot of limitations when compared to the costly software. But some of them are still very much useful while considering the applications they are used for. The ultimate aim is to get the results. Some software is costlier because of their brand names, leadership in the market, monopoly, etc. In those cases one can try cheap CAD software and it may be useful.