UPDATE 2: so my original 2 star review can be read below...but after receiving excellent customer service i have given them 5 stars. they sent me 2 replacement dimmers for the bad dimmer i got with the kit, and the problem was fixed in seconds. so to recap all the good points:

brightness: 5 stars
light color: 5 stars
ease of installation: 5 stars
customer service: 5 stars

these lights are a great way to brighten up your kitchen. I liked them so much i also bought the 6 light set for my basement.

ORIGINAL REVIEW:
light is good, color is good, installation was a breeze. i would have given 5 stars if it wasn't for the HORRIBLE high-pitched noise the dimmer switch makes. the noise is so bad I cant even use it. i am now forced to plug and un-plug when i want light rather than use the included switch. i will probably just hard-wire then to another switch at some point, but i am very disappointed with the extra work i will have to do simply because the included switch was so awful.

better luck next time Litever.

UPDATE:
I just received an e-mail from the company in which they said they have sent me not just one, but TWO new dimmers to try to fix the problem. they should be here soon, and if they fix the problem I will update again.

I absolutely love this lighting. I installed it because I didn't want to wait for my husband to do it(and I'm not very handy) and It looks amazing. They give you the option to use all double sided sticky tabs to install everything or they also provide brackets and screws. I decided to use the brackets and screws as I noticed they do get warm after being on and I wasn't sure how that would work with the adhesive long term. The lights snap right into the brackets. They provide tons of extensions for them of which I only needed one to install over the gap of the microwave/range. They provide cord holders that are also installed with the sticky pads and they work great. You can't even tell that I installed them under the cabinets. The cords were extremely easy to conceal. They have a dimmable option to install with them... Just an extra cord you plug in. It also came with adhesive backing so it was easy to conceal under the cabinets. I decided to go a step further and I ordered a Bluetooth enabled wall outlet that was controlled by Alexa for voice enabled use. So now all I have to say is "Alexa, turn on/off the kitchen lights", and they turn on/off. These lights are easily the best bang for your buck. You cannot beat this price.. They look professionally done! I'm beyond satisfied!
P.s... go with the warm white color... it looks more natural and less artificial. Adds warmth to the environment and less strain on the eyes.

Recently moved to a new house. Mfg wanted $1100 for undercounter lighting. This system works great for around $50. I can't imagine an easier installation. The quality of the components exceeded my expectations. The color temperature is what I wanted (5000K). I used the double stick tape to mount the lights. Excellent collection of accessories. Small adhesive backed lead holder to dress the leads. I didn't need to use the extension cords. Refrig is to the left in the photo. Plugged the PS into the AC outlet used to power the refrig and then drilled a hole in the cabinet to route the PS lead to the switch. Installation took 30 minutes. Very happy with this kit.

Excellent product. I searched all over reading reviews trying to find an ideal product for my situation. I have a cabinet over the microwave and stove, cabinet to the left, and three cabinets to the right. I wanted a clean install but wasn't sure how to run lights to either side of the microwave cabinet or if a splitter was needed. I plugged the power supply in above the microwave. Turns out the power supply cord is plenty long enough to be run inside the left cabinet and out the bottom where it connects to the dimmer switch and first light. I thought initially I would need a splitter installed off the power supply but turns out I did not. First light is hooked up to the dimmer switch then using two extension cables included plus an additional extension cable I ran them back up that left cabinet, over through the microwave cabinet, and then down the next cabinet and out to the next light, and so on for that side. All wires are concealed and its a clean install with the included clips. Drilled a pilot hole then a 1/2 inch hole to run cables through the cabinets. I attached the lights using the included brackets. It can be difficult working underneath the cabinet so I used a piece of tape to hold the bracket in the place, drilled through for a pilot hole, screwed into place, then removed the tape. Powers on and is controlled by the dimmer at the bottom of the left cabinet. Simply reach under at the edge and easily operate. Pictures attached. Warm white was chosen to match the light of the microwave and it all blends in seamlessly. Id advise you plug in the lights and lay out on the counter how you think it will install prior to drilling holes. You can then chose the best position for the lights to eliminate shadows and get good coverage. They are not installed in the middle of each as I first thought. And they look the best installed at the front edge. The kit might look complicated but it all goes together quite easily and logically.

Love these lights. There was an over the sink light wired to a switch that I wired these too and then changed the switch to a motion detector switch Lutron Maestro Sensor switch (2-Pack), 2A, No Neutral Required, Single-Pole, MS-OPS2-WH, White (note: this switch "clicks" each time it is activated on or off, which isn't a big deal, but it isn't ideal). Had to buy the right angle drill attachment below to run the cable through the cabinet shelves.
DEWALT DWARA100 Right Angle Attachment

Also bought these just because of how my cabinets are all arranged.
SIM&NAT LED Solderless Extension Power Cord 20AWG 10 Feet Male to Female 5.5mm x 2.1mm DC Extension Power Cable for 5050/3528 LED Strip String Light, CCTV
Litever Power Splitter, 2 Way, 1 Female Jack to 2 Male Plugs, 5.5mm x 2.1mm, 1:2, Y Adaptor Copper Cable, for CCTV Camera & LED Strip Lighting Power Supply Connector
Looking for a solution to make the lights fade up instead of just snap on.