Like Jim, I have spent good money on cheaper easels and finally bit the bullet and purchased the Beard 4 blade easel and it's superb. I have no personal experience of most of the easels mentioned in other posts, the choice is limited in the UK, so I don't know how the blades are adjusted. Bill's comment about knocking blades out of square highlights why the Beard is the best IMO for it is impossible to do that. Each blade is adjusted at both ends and and cannot move once the screws are tightened. I have had mine for 5 or 6 years and carried it around the country in the car to use when I lead workshops and the blades are as true today as they were when I purchased it. They are not cheap but they are a very good investment.