Has anyone here had experience using litespeed as a drop in replacement of Apache in cPanel? If so, what are your experiences?

What sort of performance improvements are there over Apache 2.2 (most of the benchmarks I have found are with Apache 1.3, and not really comparable)?

We are looking at using litespeed webserver on one of our Reseller hosting nodes, running 2 x Quad Core Xeon 5410, 16GB RAM, and 8 x 146GB 15k SAS RAID 10.