PowerBlocks 2.4 sufficient?

Hey everyone!

Even though I'm currently taking a break from FB as I'm going to a gym instead I wanted to ask you guys for your opinion.

I'm currently thinking about buying the PowerBlocks 2.4 but I'm not sure if the weight is sufficient as it "only" goes up to 11 kg. I already have dumbbells with interchangeable weights and I only ever use them with 5 kg or 7,5 kg. I don't even use them with their maximum weight, which is 10 kg, so I'm thinking that 11 kg should be more than enough. But I'm still hesitant because it's a lot of money... Changing the weights on my dumbbells is such a hassle, so I'm sure the PowerBlocks would be a massive improvement, but what do you guys think?!