I've only used a few times so far but works great! heats up water quickly and seens to be solidly built.

There isn't really a lot of distance between the circular heat element that must be submerged in water and the top of the unit.

This particular one heats faster than any of the others and does a very good job heating a beverage.

It is perfect for heating liquids while traveling.

It is very travel friendly and works

Performed as expected, works great traveling!

works great only draws 333 watts at surge, works fine with a River 370 solar generator

Wow I had originally given this thing five stars and worte: "So stupid, but little thing brings me so much happiness, it's a solution so perfectly calibrated in cost and function to the problem it solves."But now it just stopped working.

If you're not gonna use a Contigo or you sip too slow out of your mug, this thing is winner

This particular one heats faster than any of the others and does a very good job heating a beverage.

but it did a great job of heating up my tea also.

After buying and discarding or returning several cup holder type hot plates I decided to use one of these.

no hot plate

I used it twice for about 5 minutes each time warming up a cup of water

Had my cup boiling and ready to go in just a couple of minutes

After the water boils for about a minute, the water temperature is fairly well distributed throughout the entire cup of water and the cup is very hot to the touch due to rolling boiling water.

The motion of the rolling boil allowed me to put a metal coffee filter at the bottom of the cup and cook the coffee in the cup with the rolling boiling water agitating the grounds enough to make a great tasting cup of coffee.

Been using it for a couple weeks to enjoy a hot cup of coffee during this deployment without having to buy a coffee every day

Product defective

This product worked great when I first got it, but within a week it stopped working

Worked 4 times then never worked again

It worked great the first several times I used it to heat a cup of water for tea.

I used it twice for about 5 minutes each time warming up a cup of water

I've only used a few times so far but works great! heats up water quickly and seens to be solidly built.

This unit literally only worked 5 times and now does not work at all!

I used it like 3 times and now is not working 0000 stars garbage

This worked great at first

and together they work really work

Stopped working 6/04/20 .Don't waste your money !!!

I ordered a replacement so far and it works great.

Replacement failed after using 2 uses

I would like a replacement if given - I missed return window by 1 day.

I've learned the hard way .

Other than that, it's a nice and compact way for me to boil water when I'm traveling

Update, this stops working after using it, the correct way only, for about four days

It does exactly what you need it to do - make hot water.

I need a low power solution, since I'm using this on an off-grid solar system and I got the time to wait, but I can't afford to burn up power at 3x+ the rate for other options (like coffee pot or microwave over, or induction burner for a single cup of hot water).

I also use it to boil water in a small Japanese cast iron teapot

I use it for travel and wish that it had a holder to set it on after taking it out of the hot water

I needed a heater to warm up the water in my aquarium to 120F to kill black beard algae that has taken over the fish tank

And if you fill it at the upper end of the limit, the cup is a bit over-full and tents to splash out a few spots of water when reaching a rolling boil.

Takes 10-12 oz of water to a rolling boil in five to six minutes

With a digital thermometer, I measured the temperature of the water on the surface at a rolling boil at about 198 degrees F, but I'm at high altitude (about 5100').

The water maintains a rolling boil once the water boils.

The water started to get hot in a minute, very hot in 3 minutes, and rolling boil in 7 minutes