I just got a new DC power supply for my B-day. Yummy! This 3 output 195W programmable power supply (30V/3A, 30V/3A, and 5V/3A) is loaded with functionalities and will advantageously replace my Atten APS3005S and Extech 382260 units – though I still see usage for them. The Rigol is simple to use and has a really great UI. Especially, I appreciate the fact that you can key-in directly your values using the keys around the rotary knob. The current and voltage protection is very useful and trivial to set up and use. One other cool feature of this PSU is the display of the power for each channel. Used in conjunction with its programming capability – via SCPI (Standard Commands for Programmable Instruments) -, you can perform your power and energy measurements directly at the source. Way cool. Communications are performed using USB, LAN, RS232 or GPIB. To use LAN and RS323, even though the physical interfaces are populated out of the box, you must buy the SW extension to activate them. There are a few other options available. One negative point: the unit is really deep, and in my office, I cannot let it in place on my desk – but may have to store it vertically next to it. For more details, one can refer to Dave Jones EEVBlog.