They might be cheap, but when it comes to sound, they are worth way more.
I use them on my Ibanez K5, which is tuned to BEADG and it sounds killer. I never had strings that produce that much growl! Also the low B is really clear and punchy. Many strings could be slightly undefined or mushy on the low B bute this one is great.
They might feel a bit rough the first few hours or compared to nickel plated steel, but it's not too uncomfortable.
Also with the K5 it's sometimes a problem to keep the tuning stable with certain strings. With this strings I had no problems. they are really stable even when really diggin' in.