I picked up a 500 a couple years ago and I love using it. However, i find it to be uncomfortable to plunge and grip. I am right handed, and my hand doesnt fit on the barrel and in between the hose connection. I find the grip to be inefficient and tiring over long plunging sessions. When it came time for producing furniture, i found the 500 a little limiting with its height adjustment and domino size. 8mm and 10mm are stout, but they pale in comparison to the size of integral tenons i used to make. Just two weeks ago i was fortunate to find a new in box XL at a great discount. I snatched it up, and i regret not buying this model originally. The ergonomics make it much easier to use. Sure, it weighs quite a bit more, but it is twice as comfortable to use. Besides, how often are you wielding the 500 or 700 with just one hand? Every operation is a two-handed affair, and you dont notice the weight. I definitely notice the updated grip. Im waiting on my seneca adapter, but i kept my old 500 bits and dominoes. I frequently use the smaller sizes for panel alignment and will continue to do so with the adapter. I havent owned it long enough to give a comprehensive comparison, but it is the much better tool of the two. It is similar to how few people own the 2200, but it is the much better router. Dont be intimidated by the weight or size, if you work on medium(chair, end table, nightstand) to large projects(doors, gates, dining tables, beds) then the 700 is the right choice. The price difference definitely sucks, which is what took me so long to buy a 700. I kept waiting and waiting for a used one to pop up on the market. Finally got lucky.