Quite affordable and accurate. Much more reliable than stick on thermometers and are around 150% of the price. I use them in all of my tanks
They are quite durable and I have yet to break even one.
This product stands out from Top Fins line of products as a good buy and quality product.

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Its good, but i find electronic ones better and safe. But its cheap.

I have these in all of our tanks. Work good, and none have broke, yet. And a few have taken some hits.

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55g - 1 oscar and 1 red zebra
30g(planted) - 3 Trilineatus cories, 3 peppered cories, 1 female betta, 2 gold rasboras, and snails.
50g - 4 lethrinops intermedius
46g Hex - 2 black neon tetras, 3 bloodfin tetras, 3 blue tetras, 2 snakeskin gouramis, 3 Agassizi corys, 2 von rio tetras ,and 1 pleco

It is cheap and it is 99% acurate.

As already said these are much more accurate than the stick on ones. One of my friends has a lot of difficulty getting her thermometer to stick on her acrylic tank. Other than that these are a nice buy.

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30gL heavily planted: south american community tank
15g mod. planted: nano fish community tank
6g long(custom tank) mod planted: 6 bettas w/ dividers

It reads the temperature, and I've yet to have one shatter. Can't ask for more than that.

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A severe lack of trichogaster.

Just because your Gourami is sick does not mean it is always Iridovirus, DGIV, Gourami Disease, et cetera.
Look at all the other factors in your tank before coming to this conclusion.

I used to love these and kept one in each tank. Unlike others, the fish and I brake them periodically (usually during cleaning, moving and fighting). When I got an electronic one and compared them I became horrified. I still have a dozen of these glass ones but I tend to rely on my bevy of electronic ones. This changed happend when I systematically tested the glass alcohol thermometers against four lined up electronic ones; The paper inside appears to be misplaced at times. I live in the desert and once overheated the red alcohol thermometers become useless and unsalvageable.

Have actually broken 3 of them so far, dropped one in the tank too hard and it hit a rock, sucked one up in a python, and one was stuck to the side of the tank I was emptying and fell when the water was gone. Regular use they work great, are accurate, don't break very easy, and when they do break, well, I have had no deaths so far. The tiny balls are really hard to remove from gravel however.

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Who is "General Failure" and why is he reading my hard drive?

These are just OK. they will let you know the temp range of your water but I did not find it that accurate. That was on one of Top Fin's product from a few years ago

I use nothing but degital now

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Very inexpensive and in my experience quite accurate, moreso than the expensive digital ones I wasted my money on. Also smaller and easier on the eyes than the digital ones.

I have this in my 60 gallon while I am saving up for a digital thermometer. These are way better than the stick on kind.

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You can never have too many wheelbarrows.

Never have had a problem with them. Accurate readings.