Chasing C&C - Commercial-ish Macro Shots

Received the MP-E 65mm last fornight, bit annoyed I haven't had the opportunity to seriously use it yet until now. Had a light tent setup to do some quick shots for a lens I'm selling so threw some other stuff in there and had a play with lighting tonight. No particular purpose for the shots other than to get used to the lens a lil' more but nevertheless, wouldn't mind general C&C with specific relation on whether the lighting works or not. Especially that iPod shot.
#1 - Canon EOS20D MP-E 65mm & 550EX Off Shoe ISO400 f/16 1/250s
#2 - Canon EOS20D MP-E 65mm & 550EX Off Shoe ISO400 f/10 1/250s
#3 - Canon EOS20D MP-E 65mm & 550EX Off Shoe ISO800 f/8 1/250s
#4 - Canon EOS20D MP-E 65mm & 550EX Off Shoe ISO400 f/16 1/250s

#1 - Canon EOS20D MP-E 65mm & 550EX Off Shoe ISO400 f/16 1/250s

#2 - Canon EOS20D MP-E 65mm & 550EX Off Shoe ISO400 f/10 1/250s

#3 - Canon EOS20D MP-E 65mm & 550EX Off Shoe ISO800 f/8 1/250s

#4 - Canon EOS20D MP-E 65mm & 550EX Off Shoe ISO400 f/16 1/250s