Never tried capsules myself, but from what I've heard, no. You have to take quite a bit of them in order to feel anything.
The annoying, time consuming, bad tasting brew will, of course, yield the best results.
Instants are good. They hit you hard and fast, but that comes at the cost of shorter duration, and more expensive. Plus they're not always easy to take discretely, if that's a necessity.
Kava Candy is a good middle ground. Fairly good taste, look just like candy/mint so you can take whenever/wherever without having to explain yourself. The effects are relatively weak compared to the brew, but they are definitely there. They can get expensive if you take them often though. Personally, I don't use them much, but I love having them around for times of need.