Hi Sweety, and welcome
If I could add anything to what others have said, and what you have already said, it would only be that it can be good to remember to ask others what they need. So often, we take it upon ourselves to ensure that we are balancing time/energy/whatever else (especially if we are the hinge in a V), and can forget to ask whether this actually suits everyone. For example, while one partner may love having a date night in the house just watching TV and being together, another partner may love to go out of town and experience new things.
Since you said you are looking for personal experiences?... As a general rule of thumb, if I've been on a date with someone, I'll try to make a date/special time with my GF. If I've been having a rough time with someone and GF's been dealing with my mopey ass, I'll try to make some special time with GF to connect and avoid letting relationship problems with one partner spill into my relationship with GF.
On the other hand, I'd say that my GF struggles with balancing time. She also doesn't 'do' scheduling. She is a much less structured and more free-flowing person. This can make things difficult for us, but we try to understand each other and not take each other's different approaches personally. I'd say that's useful when it comes to poly time management.
Generally, I think things work well when you are able to understand each other. My GF and her husband, for instance, are pretty content to spend time around the house watching TV together. If GF applied this style of quality time with me, I'd be frustrated and bored, since I like adventure and discovery. So for us, it's not so much about having equal time, but simply feeling that we are able to regularly connect, in whatever way we prefer to connect. Does that make sense?