LKQ stands for like kind and quality.

LKQ is a big player - and they have been buying up a lot of companies in the automotive space

http://bit.ly/ex8J2r

That said, it's likely that you got a good one; and when you buy a quality engine - it's great.
That's why they warranty them for 36-month, 100,000-miles covering parts and labor for the first 50,000 miles and parts only for an additional 50,000 miles (our warranty - lkq is similar)

http://bit.ly/gFFhtK

I don't know a lot about their product, but I'd consider:

1. Quality - find out their defect rate. The last thing you want to do is pull this engine too -- especially if they don't cover labor costs. (for example ours is 1.9% - I recommend it as a benchmark)
2. Warranty (mileage, years, does is cover labor? this is critical)
3. Price - this one is important
- did the dealership mark it up? (most likely) find out the online price from lkq direct. since the warranty is w/ lkq - you really don't benefit from the dealer purchase.
- how are alternatives priced?

all reman engines are not the same -- but you shouldn't pay more than necessary.

just my 2cents.

Joe

twitter: @repowertrain