I have and I thought they were very good, although it was back in 2000 and they have changed onwners since. Lysa Wollard worked there when I was there but now she owns the place. The aircraft were all in fair shape (typical American standard) and they were very well organised which I like. The only pain was that the aircraft (apart from one 152) were parked a fair way from the club.
LVK is good - the weather remains good as it is too far inland to be affected by the marine layer.
You can get there by public transport too (unusual for America) if you don't want to bother renting a car.
PM me if you need any info..I would use them again.