I have done my research on this seller and from everything I have gathered they are legit. A few of the pieces that I have purchased from them I have had authenticated and all of them passed. In my humble opinion they are good.
I know this is an old post, but I wanted to leave this note here for anyone researching this seller. I just checked a batch of autographs I am familiar with from a particular show in their store and it appears highly likely to me that most or all of them are fakes. There's a pretty good sample size they are selling from this show (50+ autographs) and they just look too different from the 100s' of authentic examples I have seen and own.
There are plenty of posts on this seller and it seems the consensus is that they have a mix of both authentic and fake autographs in their store. Their "Featured Items" with JSA certification appear to be authentic - I'm sure that's done to give the appearance that their store is legit. I personally would stay away from anything they're selling that doesn't have a PSA, Beckett or JSA certification.