The quality of the strings does not stand out in any way; this is true - BUT !!! Given the cost of the cheapest options for a 12-string guitar in local stores, this set, if you exclude delivery, costs almost 3 times lower than the most miserable strings, while the quality is not worse, or maybe better.
I have a 12-string Washburn electro-acoustic guitar, I can’t say that it’s a budget one, but better than the Ibanez that I had before it. The bottom line is that when using a guitar with an amplified amplifier, having built an equalizer, chorus and reverb, the sound of all sets of strings becomes almost the same.
I am not a supporter of cheap strings and prefer products from USA - BUT! On an electric guitar or bass, especially acoustic, I very clearly hear the difference and feel it with my fingers between inexpensive and normal strings, and indeed even sets for a 7-string electric guitar are inexpensive, but as for the 12-string variants, the price is sky-high. Therefore, I either have to save money, but change the strings more often, in the case of the Harley Benton kit, I can say that they are not the most wear-resistant, while they stretch a little to make it easier to press the double strings - this is important! And in general, not the most dull sound without connecting a guitar. In general, their money is definitely worth it.
By the way, earlier on Thomann I ordered myself an 8-string Harley Benton electric guitar, I play it often and don’t take the 7-string in my hands anymore. Soon I will have to change the strings, look at the prices and again see inadequate numbers in local stores, most likely I will trust Thomann products when I place a new order, and now I’m waiting for my electric stool, wood floor and other goods from Thomann the other day.