Hello,
My brother in law owns a tyre fitting business. He says they are very cheap, but perfectly adequate for use on caravans and are a standard cheap tyre for use on vans. He says they are fine, but says they aren't the best for fast modern vans, so much as slow, old ones which do no miles (builders, local tradesmen, etc) because they're not very grippy and are noisy. Tough and cheap though.
hope it helps