I have not bought from them for a couple of years. I had 3 out of 9 varieties come up wrong (a beefsteak that was a cherry...
)
On the other hand, I have had very good results buying from Marriana's heirloom seeds (both on her website and from the Yearbook.)
I am always a little leery when seeds "have a story" or a name I have never heard of...many times that means someone has changed the name of a variety to something more clever. Having grown nothing but paste/dry/few-seeded/oxheart varieties for more than 10 years, I am familiar with most varieties available (not all but most.) I admit ignorance on the "general" tomato population.
I have also had excellent results buying from yearbook growers...I think most are very conscientious. And don't get me started on tomato photos...