I have been using them for almost a year. And I am happy with this purchase.
The suitcase is of very cheap construction and I feel that it does not have a good grip, but it does not create a particular problem.
Their handle is very convenient.
I recommend them!

The weights are fine, it's just that the bar doesn't have any padding for the hands, that's why 4 stars instead of 5.

Φ26 (26.05) Discs on Φ24 (24.15) handles (measured with an electronic caliper)

+ Forged discs
+ Quality handles (with grips)
+ Good grip.

- 2x9.5 Kg (Not 2x10Kg)

4x 0.5Kg = 2Kg
4x 1.25Kg = 2x1.15Kg + 1x 1.17Kg + 1x 1.26Kg = 4.73 Kg
4x 2.5Kg = 2 x 2.34Kg + 1x 2.35Kg + 2.38Kg = 9.41 Kg
2 Handles = 1.43Kg + 1.44Kg = 2.87 Kg

- The bag is of poor quality cheap plastic that does not close properly and all the elements inside have gaps and make noise (they don't stay in place). I don't trust it for transportation unless I tie it up.

good quality functionally

From the short time that I have the set, it seems to be of very good quality. So far, I am satisfied.

Positive
Very good quality, iron construction that looks quite high-quality (I have only done 1 workout so far, so it's still quite early).

Negative
Very few negatives that personally don't bother me.
The carrying case is not that good for transportation.
The clasp that tightens the weights is not bad, but it might not tighten as well in the future (of course, it has extra rubber bands for replacement that will help it last longer).

But as a general conclusion, they are definitely worth it

I ordered this particular product a few months ago. It is truly practical and value for money.
It has two dumbbells and many small weights to create various modified weights. The construction quality is very good. Lastly, the carrying bag-box is very useful. I highly recommend it.

I have had this product since June. For someone starting with weights and not wanting to spend a lot of money on a satisfactory set, these will work for them. The weight and build quality are satisfactory. The dumbbells are very good and I see that they can withstand.

However, with the screw-on and off, I have the impression that the "clamp" that tightens and holds the bars has loosened and occasionally unscrews, but not to the extent that you wouldn't notice it and end up with a broken tile. This is the only drawback.

I should note that, in the case that someone wants to get a "large" bar, they should make sure it has a diameter of Φ28 for the plates to fit. I made the mistake of getting one with a Φ25 and they don't fit. I recommend the Optimum RB72T/180 in this case.