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's blue lines, box 23's red lines, and box 48's blue lines.

For the next 50, your lines show improvement. Wobbling is still present throughout the set, but 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 box 59, box 72, and box 94.

For the last 150, your lines continue to improve, with wobbling further reduced towards the end. 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 109, box 175, and box 234. 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 191, box 203, box 226, and box 245. 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.