Dan, Steven and Robert have given good advice and summarized well what's offered in the next levels of RS. I have been through Nivel 1,2 &3 of LSLC , Premium, Premium Plus and Platinum of RS, the Platinum not quite as much in a "studying" mode. I waited until I had completed RS Premium Plus before I tackled LSLC and for me that was a good approach. Also, back when I started RS one could download the grammar books Beginners and Advanced all at once and I went over them intensely and still refer to them when needed. Now what I recommend, is to go through Premium Plus then Nivel dos of LSLC, which as you've said, covers a LOT of tenses and is very intense. This will give you a good foundation for the next level of either programs. I think both RS & LSLC are great and I found them complimentary. Sorry for such a long reply, but I couldn't answer succinctly. One last thing, LSLC periodically has sales for members which I availed myself of when I bought Dos & Tres.