I guess it's more of a personal preference...having a big ballast over a slim ballast...Slim is a lil more sleek, easy to mount and can fit in tight spaces. I had the regular sized ballasts, but I did like the new slim ones much better once I saw how smaller they were compared to the regular ballasts.

I don't know how many times you've ordered. from DDM..but my 3 times I've ordered from all different occasions, somethings gone wrong. Once is okay, but three times seems a bit too much. My first time, they had me waiting for 3 weeks for my kit because apparently it wasn't in stock but on their website it was showing it was still available, they didn't even notify me that the item was back ordered or anything. Right after I called, a few days later they started updating their website with current order statuses. My buddy had the same thing happen with his kit that he ordered for his camry back in March and he received 35 watt ballasts instead of the 55 watt ones. So I guess it hasn't changed too much. That being said...I love their products and prices...I just dislike their service

 

True...
Well, I will say that I have ordered 4 sets from them and always 35 watt. Have always gotten it right for me.
My boss...for some reason 1 ballast of his kept burning out, they finally figured it was probably the bulb causing it. I followed the online process and aside from having to pay $10 shipping back to them every time, it's been spot on.

No biggy, and yes, I agree...the slim ballasts are a LOT better.