Series 7 & 66 Kaplan vs. TC (Training Consulting)

I spent hours on doing research on this topic and I can't find anything up to date. Any forum or discussion I can find was from 2008 - 2010 (too old information). In few weeks I'm taking Series 7 test and besides that I'm foreigner and English is my 2nd language I'm also new to financial business. I have only one attempt to pass Series 7 and then Series 66, so if somebody could help me and let me know which materials Kaplan or TC in your opinion are more helpful, nicely explained and easier to learn from, I would be very grateful.

From what I know, my company will provide me with STC to study from but I prefer to invest some money in a better study materials since I learned from lots of research that STC suck and I don't want to risk.

Any suggestions will be very helpful.

Thank you!