So when my shocks went to crud and I was on a budget for a bit, I decided to buy Sensen shocks from Ebay that had a lifetime warranty. My thoughts were if they fail after 10k miles, so be it, it wasn't that much, but they have handled fantastically.
Ride Quality: much less harsh, feel the bumps less.
Stability: More stable than OEM shocks up to the maximum speed.
Abuse: I drive like a jacka$$ and the shocks have no leaks or signs of abnormal wear and tear and it has actually improved my tire wear, from the prior shocks.
Install: It was a little tight going in, but some grease helped it, no modifications necessary. It came with the suspension bolts up top.
Quality: they were manufactured to international OEM quality and certified according to ISO 9001:2000, which is generally higher than U.S. DOT standards.
So if anybody else is on a budget and considering buying it from eBay, my take is go for it, I have not found a reason to replace these until they fail, but even when they do.. the lifetime warranty will give me new shocks or I can go for lowering my car with coilovers, but the California potholes will destroy everything.