I used both CBT Nuggets and the Chris Bryant Advantage videos. The CBT nuggets are def more entertaining but I find Bryant goes slower and into a lot more detail. Bryant videos are on sale at the moment as well. See link below.
You do know that CCNP Collaboration was being discussed here.. there's plenty of stuff out there for R&S.. Collab on the other hand..well .. This sub's a ghost town ever since the push from Voice to Collab without proper study materials aside from bootcamps that cost you an arm and a leg
The Cisco Press book was pretty much useless when I was studying for CIPTV2 last year. The free design guides (SRND) and hands-on lab work on is unfortunately the way to go.
Wow, those learning network videos are $1k per test
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The free trial materials are quite good.
https://www.udemy.com/ccnpallinone/
[X] CIPTV2 300-075
[ ] SIP School SSCA
[X] CCNP Switch 300-115 [X] CCNP Route 300-101 [X] CCNP Tshoot 300-135
[ ] LPIC1-101 [ ] LPIC1-102 (wishful thinking)
Wow, those learning network videos are $1k per test