I'm seeing a lot of issues being posted on this board, and figured I'd provide some positive feedback on one of the labs, so this isn't meant as a question, just as a compliment. 
Although most labs have been pretty great to go through, HOL-PRT-03 features a very well written lab manual, and was very easy to maintain my attention and interest throughout.
Keep up the good work, I'm really enjoying my HOL experience!