I did some research and did­n’t find any­thing too neg­a­tive towards get­ting this Phot­tix BP-40D vs a Canon BG-E2/BG-E2N as a grip for my 30D oth­er than the make. The pro-point is that its only $75 shipped from Hong Kong to San Fran­cis­co. It has the same fea­tures as its Canon coun­ter­part but for less. Here are some points from the eBay sell­er, ete­fore (aka. HK Sup­plies), of whom I got it from:

• The Ver­ti­cal Grip/Battery Hold­er adds a ver­ti­cal shut­ter release, and is com­pat­i­ble with up to two BP-511, BP-511A Lithi­um-ion bat­tery packs, or six AA bat­ter­ies with includ­ed bat­tery hold­er. It pro­vides addi­tion­al shut­ter release, main dial, AE lock/FE lock and AF point selec­tion con­trols for eas­i­er ver­ti­cal shoot­ing.
• The bat­tery hold­er works with one or two BP-511/BP-511A bat­ter­ies.
• Bat­tery Hold­er for six AA bat­ter­ies
• Instruc­tion in Chinese/English/Netherlands/French/Germany/Italian/Spanish
• It also has a tri­pod sock­et.
• The bat­tery grip and the bat­ter­ies are NOT Canon made.
• These high qual­i­ty prod­uct with big dis­count from the orig­i­nal one.
• Made of top qual­i­ty mate­ri­als and the best qual­i­ty you can find in the mar­ket.

To add to that, based on Phot­tix’ web­site, the grip can be used on the fol­low­ing dSLR bod­ies:

• Canon 300D, 350D/XT, 400D/XTi, 10D, 20D, 30D, 40D, and 5D
• Nikon D200, D70s, D80, D40, and D40x

Here’s some pho­tos of it (by Flick­rite presspix):

Mean­while, I’m hop­ing to receive it by either lat­er this week, or ear­ly next week. I’ve bought from ete­fore before and they ship pret­ty fast. I’ll update when I have received it and have giv­en it a test run.