For many years, I used a budget solder from Praktiker without complaints for small soldering in electronics. Now, the only cheap solder is the one from Chinese stores, which is a real nightmare; it doesn't melt at all and doesn't adhere to surfaces without soldering. After reading so many positive reviews about this one, I decided to give it a try despite its inflated price due to the many grams. In the end, this solder makes you look good, with its low melting point, its immediate adhesion to surfaces, and the nice spread it creates without cracking and with a shiny finish. On the downside, the smell.

Very good tin.
Not like the Chinese ones that drain your soul.
Proper soldering, worth the money!

Finally, after two failed purchases, I found the right solder for electronic and electrical connections.
It is excellent. It contains the correct ratio of metals. It melts at a low temperature, withstands high temperatures without burning, spreads evenly (with the use of flux), and when it cools down, it leaves a mirror-like surface.
Get it without hesitation.
Michalis

Since it has 63% tin and 37% lead, it is suitable for electronics. It does the job, but it is not as good as what CAUCAS "RX-70" usually provides. Then it rolls and the soldering iron you use.

As a professional, I highly recommend it! I have bought more expensive ones without lead and they are of the same quality! It melts even at 320C and makes good connections! SN63-PB37 1.8 Flux.
P.S. Never buy Chinese ones no matter how much they claim to be of good quality. They are all rubbish!

It sticks well, no need for flux (it already has) and personally, I have no complaints.