I learnt about KentCNC dust shoes from a YouTube video. I have been using the Standard Split-Shoe for about two weeks non-stop. It is installed in a new NextwaveCNC SharkHD HD510 with water 80mm spindle. I first bough the Nextwave's version, but that was inferior in many respects compared with the Kent's.
First, the hose port was 2.5" forcing me to use a 4" to 2.5" adapter. However, I use a Jet Cyclone 110V, which gives me about 600 cfm at the end of the 4" flexible hose where it would connect to the dust shoe. When using the 2.5" adapter, suction is reduced to a meager 150 cfm. With the 4" port in the Kent's dust shoe, I still retain over 550 cfm. This translates to no chips or dust whatsoever, be that from wood, foam, or plastic.
Second, the dust-shoe support is made of acrylic, which lets you see the bit and the cutting, when it is clean (even when it is only useful for a rough inspection). It is thick and doesn't flex.
Third, the Kent's dust shoe has the optional 1/2" extender plates that allows you to lower the brush another 1/2". This is great for me as it covers the two heights that I use for all my bits. The shorter bits, e.g., face mill, V carve, straight plunge, are used without the extender, whereas my long upcut and downcut end mills are used with the extender. Otherwise, I would need to lift the spindle or suffer some chip/dust spill from the gap created between the work piece and the brush, when I use the long bits.
Fourth, the quality of the brush is far superior to anything else I've seen in dust shoes. It is packed with hairs leaving no gaps. It also has a double hair line at the hose-port side that prevents the hairs from being sucked into the port. Smart design.
Fifth, the Kent's dust shoe comes with the plastic quick connect port, which works fantastic. I put a quick connect piece at the end of the flexible 4" hose and disconnect the hose every time I finish a piece to clean the piece and occasionally the CNC bed if there was some chip/dust spill.
The split design, which is engineered to hold the base to the spindle, works flawlessly. You have to adjust one screw at the split, just tight enough until the acrylic base does not wiggle when you exert moderate pressure on it, and that's it. The base will hold the brush, extender, flexible hose without becoming loose, even after continuously connecting and disconnecting the flexible hose after every work piece is finished.
Finally, the magnetic design makes placing the brush on and off a breeze. Just make sure you remove the brush by pressing on the right side of the shoe first, where there is only one magnet. Otherwise, the magnets are so strong that it is hard to remove the shoe if pressing from the left side.
The only con that I can think of is the price but that depends on the longevity of the product, a feature that I cannot comment on. It looks and feels a high quality product. Besides, the manufacturers' dust shoes usually cost in this range and are much inferior in my view.
Overall, I highly recommend this product and without reservations.