For the first 50, I see some arcing and wobbling, box 8, box 30, and box 43. Your convergences show decent accuracy, though I noticed some lines pair off and converge towards two vanishing points, like box 12's orange lines, box 34's pink lines, and box 46's pink lines.

For the next 50, your lines show improvement. There is still some arcing and wobbling present, like box 57, box 68, and box 87, but these instances are less dramatic overall. Your convergences also show improvement, though there are still instances of lines pairing off like box 70's pink lines, box 81's green lines, and box 100.

For the last 150, your lines continue to improve. Arcing and wobbling are less frequent, especially in the last boxes of the challenge. However, some is still present, like box 115, box 155, and box 194. I recommend reviewing the information in this section and ensure that you are practicing the proper technique.

Your convergences also show continued improvement, though there are still instances of lines pairing off, like box 122's pink lines, box 180's green lines, and box 227's blue lines. 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, box 44 is missing some line extensions. It's not a major issue since it only happened once, but I want to point it out for future reference.

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