CBT Nuggets or CompTIA Certmaster

So I'm going through materials to help study, and I'm wondering what peoples thoughts are on CompTIA Cert master is for a individual license for the network + is 139. Has anyone used this service or would I be better to stick to books and Professor Messer's videos? Any inputs would be appreciated. CBT nuggets for 99 a month seems like a lot but I've never used it.