Hey there, Nick! So, congrats on making it through the whole challenge! That's nothing to sneeze at and I'll start out by saying I see a good deal of improvement over the course of the set. However, I have a few reservations concerning the challenge as a whole.

Ok, so I do have a small concern starting out - your boxes are completely crowded on each page and I'm worried that this may have hindered your learning a little bit. The reason you want to give them some space is so your brain can process the correction lines and see where you might improve - when they're crowded like that, it's a lot of information to process and you're likely to miss details.

From the start, your mark-making is a great deal sloppier than what we expect to see. Your lines don't hit their end points, the hatch-marks are rushed, and you've neglected to add in superimposed lines for line weight, which overall makes the illusion of 3D form fairly weak. Additionally, it tells me that you rushed through this challenge. :(

It's important to ask yourself why you chose to do this - there is no time limit on completing the challenge and while I will admit it is a pain in the ass, that is the point of it. It's meant to test patience and consistency. Likewise, we're not looking for a Completed Challenge, we're looking for improvement and mindful learning. By rushing through it, you've deprived yourself primarily, which we genuinely hate to see, so it's important that we warn you against it.

Of course, that isn't to say you haven't learned anything from it! I can clearly see that your convergences get quite good. You have fewer stray or diverging lines towards the end which is telling me that your sense of 3D is improving quickly. Likewise, your line work improves as well, simply by virtue of mileage. So, you're moving in the right direction, but it is slower than it would've been if you'd taken your time.

So, for your convergences please take a look at these notes - we link them at the end of every challenge as a matter of course, but I'd like you to apply them to a resubmission of 25 additional boxes. They go over the angle of each line as they approach the box and how keeping an eye on this relationship could improve your convergences. Also, considering each line in relation to the lines with which it shares a vanishing point rather than the lines with which it shares a plane or a corner could do the same.