They should work very well for your level, as they were built as sort of a foundation for players up to 100-200NL originally. I would peg them to be spot on relevant for levels up to 50NL now, and levels above depend a lot on the type of skills the viewer has built up already (as really bad players can play 1000NL and still get value from a pack like this, whereas a really good player at 600NL may not).
The videos are a little over 1.5 years old.
They should work very well for your level, as they were built as sort of a foundation for players up to 100-200NL originally. I would peg them to be spot on relevant for levels up to 50NL now, and levels above depend a lot on the type of skills the viewer has built up already (as really bad players can play 1000NL and still get value from a pack like this, whereas a really good player at 600NL may not).