Never heard of them although I am sure that they are black & round.
My issue with private label tires is that they're hit or miss and I've never, ever, ever been happy with them. Now this may have changed since my last private label tire purchase. IMO, they're for vehicles that you only want to keep just another year and then get rid of the vehicle. OR because you need a tire or two in order to pass your state inspection. OR you need to at least put something that looks decent when advertising your vehicle for sale.
IMO, private label tires ARE NOT for the long term, they're only to get you by temporally. However, they'll end up costing you more in the long run as they typically wear out soon or start to perform terrible when you need them to perform at their best. Can't keep'em balanced, they experience radial pull, or start to thump due to having a broken belt OR even all 4 wear differently(all being bad) even when rotated regularly. This has been my exprerience even though I've heard other rave about their own experience(s).
Keep in mind the cost of having new tires mounted/balanced AGAIN due to buying poor tires in the first place. If you are keeping your vehicle for any length of time, buy a good tire that meets your criteria of how you drive and the climate you live in.