is it 2 much? not enough?

It's a fairly good workout to start with to tone muscle and build a bit of strength.

However, to lose weight it needs more cardio in it. Try skipping for 5-10 minutes, or a short run etc

http://tip4weightloss.blogspot.com/ go here for more tips.

Now to your question: I would say take out some exercises and their numbers with other exercise. For example take the 20 reverse sit ups out and do 40 sit ups. take 20 crunches out and do 40 push ups because it makes it easier to do them. Or you will get tired really soon because of frequent movement of all the body parts.

You may want to add in a little bit of jogging, that would be some good cardio.

id say it sounds good, but if you want to lose more wieght you have to burn more calories. id say you need to add some cardio to that work out. but what youre doing will totally tone you.