Is the Ironmaster Quick Change Dumbbell System Worth It

I am looking to save some space in my home gym in Vancouver and I am considering the Ironmaster quick change dumbbell system. I have heard they are much more durable than the dial style dumbbells like PowerBlock or Bowflex because they are made of solid steel. They also look more like a traditional dumbbell.

The downside is that it takes a bit longer to change the weight since you have to screw the pin in. I am wondering if this is a major annoyance during supersets. I also want to know if they feel balanced and if the plates rattle at all during movements like presses or curls.

Are they worth the investment for a serious lifter? I want a set that can go up to at least eighty or one hundred pounds. If you have the Ironmasters please let me know your thoughts on the quality and if the weight change time is a deal breaker for you.