I have downloaded this V-Ray plug-in for sketchup and I feel like it is the best render engine i have used. the refelction and light of this program make my sketchup 3d model look really realitic.
The uses of this program is not too complicated but it takes some efforts. I would say if you spend some times to get a hang of it, then you will be able do it.
The only big comment from me would be the cost, it's still high compared to other plug-ins and I think that would be a biggest factor when it comes to choose which plug-in I will buy.