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 6, box 26, 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 52, box 76, and box 96.

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 111, box 174, and box 226. 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, including: box 54, box 103, box 157, and box 178. Also, box 170 and box 141 have some lines extended in the wrong direction. It's not a major issue since it didn't happen too often. Just be sure to double-check that all lines are extended correctly going forward.

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