For the first 50, your lines are clean overall. However, I did see some wobbling throughout the set. Your convergences also show good accuracy, though I did see some lines pair off and converge towards two vanishing points, like in box 5, box 25, and box 46.

For the next 50, your lines show improvement. While wobbling is still present, most instances are less dramatic overall. Your convergences also show improvement in accuracy, though there are a few more instances of lines pairing off, like in box 59, box 79, and box 100.

For the last 150, your lines continue to improve, with wobbling further reduced. However, since it was present throughout the challenge, I do recommend reviewing the information in this section to ensure that you're practicing the proper technique.

Your convergences also continue to improve, though there are still instances of lines pairing off, like in box 113, box 173, and box 238. In these boxes, the inner lines (green and orange in this diagram) diverge instead of converging at the vanishing point. Keeping in mind the angles of neighboring lines can help when planning the box's construction.

As an aside, some of your boxes are missing some line extensions: box 44, box 107, and boxes 162 and 165. Also, some of your boxes have some lines extended in the wrong direction: box 51, box 85, and box 146. It's not a major issue since it didn't happen often, but I want to point it out for future reference.

All said, you did well. I'm going to mark this challenge as complete.