We have had the Alphacheck underblanket for about a month. Its size is good, it covers the entire length of our bed, the mattress support straps seem durable, it heats up quickly. I hope that in the future it will be just as good and efficient.

In a quarter to half an hour, it warms the covered bed on the third setting, without the resistances being felt under the sheet. Incredible feeling of warmth when you lie down, which lasts even after you turn off the mattress for the whole night. It has separate controls for each side of the bed.

I am coming back, from 5 stars I will drop to 1. It was fine at first, but in less than 2 months of moderate use it sparked and burned on one side. This has never happened to me even with the cheapest ones.

Easy to use and very efficient. You don't feel the resistance at all. The only negative is that the bands do not fit well on a very thick mattress, they cut. I don't deduct a star from this as it may fit properly on most mattresses.

I have it for a month, it's great, it does what it promises, if you leave it on 3 and lie down, you wake up in the middle of the night soaked. However, for automatic shutdown that I read, mine doesn't have it.

Honest mattress for the money! The springs didn't bother us much, it fit exceptionally well on our bed, and it warms up very sweetly.

In the negatives, it is short for a double bed with dimensions 1.60x2.00. The legs are left outside, it would help maybe if it was laid lower on the bed so that it starts from the shoulders and not from the pillow. Also, there are points that do not heat up at all.
In the positives, it heats up relatively quickly, the third level is very warm and I only use it for preheating. Then I leave it on the second level and it is fine.
I believe that if it was longer to cover the legs as well, it would be worth its money more.

Very good, heats up quickly, it is not exactly double, I have it in a semi-double size and it barely covers the width, it doesn't reach the length, it's only in the middle almost. It doesn't cover the whole mattress, so I don't think it's necessary, but it's very good for its price.

In general, it is worth buying. Positive that it has two controllers for separate operation on the left and right side of the bed. On level 3, it heats up too much, on level 2, it is somewhat satisfactory, while on level 1, it hardly heats up at all... The main thing I didn't like is the dimensions. Of course, it states that it is 140x160, but for a double bed, it is not satisfactory... I have another product from the same company and indeed, in terms of quality, I believe it is one of the best at this price.

I have had it since November and it has worked perfectly for me. It shuts off on its own after 3 hours, so that is very positive. It has two controllers and three levels. The only thing I have noticed is that it doesn't heat up very well upwards. Other than that, 10/10.

First time buying such a product so I have no comparison measure. I recommend it 100% for anyone considering it. In a quarter it has heated the mattress too much. Warm and dry mattress for the first time and the feeling is simply indescribable. The controller is nice and simple. It has two sockets, one on each side. The only thing that bothered me a little is that you can slightly feel the resistance. Not something tragic of course, but you definitely feel it on your body. The overall feeling is like lying on crumpled sheets. Considering its price, I consider it a very good purchase. If it withstands time, it will be awesome.