I've been using Helicore strings for more than 4 years now, and they are above expectations, especially in the price point. They are durable, fast to maintain tune after setting up, and have consistent sound. They are super reliable, however, they are not the type of strings that makes the violin sound outstanding though.
I've been using them on my Electric violin for more than 100 gigs. They especially are superior in maintain tuning. In more than one case, my strings went broken, due to leaving them for long periods on the violin. In those case, I did change the broken strings in a couple of minutes, tune them a couple of time, and then the string would maintain the tuning until the rest of the gig. They have been also good for my acoustic violin, as they have consistently good sound. So, all in all, they are recommended.