I like that they have people who are very knowledgeable about how VCs work (and also know their way around our technology).
They don't seem overly focused in what we do, which is great for us since it doesn’t mean much if you're not solving some big problems with your product/service! Also loved having them be there at YC Demo Day - really cool experience overall!! We haven;'e used any other services from SL so far but would definitely consider using more of theirs when needed down future road as well because those folks make sure things get done quickly & professionally whenever possible :).