Lines

They are generally good and they improve over the set, but near the end you still have some wobbly lines. Remember that drawing confident lines is more important than drawing them accurately, so always focus on confidence over accuracy.

Ellipses

Your ellipses look really nice! Only issue is that some ellipses overlap a little bit. But prioritizing the confidence over accuracy is good.

On the funnels some of your your center ellipses also look a little wobbly, but the rest of them look solid.

Boxes

On boxes your lines are getting a little less confident. Approach lines as you did on the previous exercises. It doesn't matter if they're in a box or in a plane, the approach is the same.

You're also having a little bit of trouble maintaining horizontal lines parallel to the horizon. It's hard, but keep trying to do your best on it. Don't forget you can replace dots before drawing a line if you feel that the previous dot was misplaced.

On organic perspective It also looks like you repeat a couple of lines to try to correct them. Don't forget that no matter how off a line is, you shouldn't repeat it.

Perspective on the boxes has issues, but you'll work on it on the box challenge, so nothing to worry about.

Overall though nice job, keep it up and good luck with the box challenge!