A good way to determine decent value is to look at the cost per megabit per second. For example, you might jump at a 100Mbps plan for $20 per month and skip a 500Mbps plan for $40 per month. After all, you're playing $20 less per month with the 100Mbps option.
However, when you look at the cost per Mbps, it's 20 cents per Mbps for the 100 plan and just 8 cents per Mbps for the 500 plan. If you have several users in your household and multiple smart devices throughout the home, you'll notice the performance difference in having the 500Mbps plan versus settling for the 100Mbps option.
Finally, don't forget the value of promotional perks. If a plan offers you free HBO Max, that's a savings of $15 a month or $180 a year if you were already subscribed. As more of us lean on our streaming services, that's an excellent value.