One of the legendary marques in frame building, they are most well known for their curly (vibrant) stays, as well as the extremely ornate lug work on many of their frames.  Hetchins did build frames with straight stays and less ornate lug work, so there is likely one out there for every cyclist's personal tastes in design.  And all of them ride very nicely.  Examples from the 70's and earlier are highly sought after by collectors.  Later examples were built by Bob Jackson and are not valued as highly.