We used it last summer and I think it works pretty well. Because its set around the theme of rubbish and stuff we think it worked well with the kids because they are hearing a lot from schools and homes about recycling. The whole drama revolves around a beautiful park that gets messed up and then over the week all the "junk" gets recycled into useful things - a pond, a bench etc. Speaking of the pond we still have the old water tank we used which you are welcome to use/borrow if you decided to go ahead (its easier to move and stuff than a bath tub!)
From memory I think the material for day 4 was a bit tricky to get across - but with preparation you should manage.
We may also have some of the booklets left over which you can have. I will have a look today at church.