Anyone using the Eibach rear lowering coils?

[Mattchu60]

I searched quite a bit but couldn't find anything. I am wanting to put a 4" lowering rear coil into my truck - still want to occasionally put some weight in the bed. At first I was reading about the CPP 4" HD drop coils - some people said they were fine, others said they rode rough.

I was on Eibach's website and they offer a 4" drop progressive spring - I would think progressive would be the way to go - but i can't find anything about these coils as far as people using them.

Any input? Are they good? Looking for something with good ride but also a little capacity - not going to be hauling really heavy stuff, but the occasional trip to home depot for supplies may happen, or maybe 300-400 lbs of seed corn in the bed.