I have a SL+ with a Friedman mod. It sounds really good for high gain, but that's all it does now. Not versatile at all. But for high gain, it's great.
The guy's obviously amazing at what he does; his client list speaks for itself. However, I have seen some shoddy work come out of his shop when it comes to modules. I have a feeling he's not doing all the actual mods himself. I'd be willing to bet he's got some hired hands there at the shop. I don't know whether that's the case or not, but if not, he's definitely done some sloppy work in the past.
Also, his email replies are frustratingly short. Usually a fragment of one sentence to answer a question. I know the guy's busy, but I'd like to see a little more detail in his responses.