This is one awesome machine!  I upgraded from another brand and what a difference, I should have spent the extra dollars to start with, and highly recommend seriously considering this scroll saw for anybody wanting to get into scrolling, or even for those with any experience at any level.  First and foremost - blade insertion is easy and simple with just a little practice, insert the blade top first and snug the thumb screw, and if you are at 90 degrees with the table the bottom fits right in, tighten both blade screws.  The machine I moved up from had adapters for the blades, and it was a very frustrating procedure when having to poke the blade through a hole, attaching the adapter to the blade, then hooking the adapters.  With the DEWALT all it takes is turning the tension lever to the off position, releasing the top blade screw, poking the blade through the hole, then resetting the top blade, and resetting the tension.  Once you get used to it, it only takes about 5 - 10 seconds to accomplish this.  The machine is HEAVY, the table probably weighs about 50% of the total weight, and when bolted down produces very little vibration.  The instructions for putting it together are very clear, and unless you are into power lifting I recommend getting help to get it out of the box and onto the work surface.  I've been cutting out patterns in both 1/4" and 1/2" wood, and running at a slow speed (real curvy lines) on both thicknesses, and the machine does not bog down at all.  Overall this is one outstanding saw, and well worth the investment.  I've found that working with it is much less frustrating than my old one, and I actually enjoy working on it.