I love my HP and I'm sure this will compare to some degree. My only complaint with the HP as well as this, is the I/O capacity. Four of each gets eaten up quick especially if you do plan to add a turbo or something and want to use boost or N20, fans, TBrake,etc. But the dominatior has so many I/Os most guys will never use them and it doesnt justify the added cost for most. Be nice to see like a 10(ea) capacity I/O or so. If anyone is looking to buy a stand alone efi unit I would strongly recommended downloading the (free) software first and seeing if it's something that you can easily navigate and understand. That's what sold me on the holley. Super easy software to learn compared to the likes of say HP tuners... Just my 2 cents