I will agree.. It is hands down the best mod for the money so far for me..
I bought the Skunk2 swaybar which is 21mm, and I have the stock 22mm Front swaybar on still. It made a night and day difference.
When deciding on a swaybar there are several things you should take into consideration. First is what size front swaybar do you currently have. You may want to upgrade that first if its on the small side I think Suspension Technics has a package that you can buy that include both the Front and rear swaybar. But Im not sure if they have one for your car. Its worth looking into tho.
The next thing you want to take into consideration is how the rear swaybar mounts onto your car. I got lucky because the 6th Gen civics already have all the wholes in the LCA [Lower control arms] and in the subframe, so my skunk2 bar bolted right up with no modification at all. With the 5th gen you arent so lucky. Some kits like the Skunk2 will require Integra LCAs that come with the holes for the endlinks. Other kits dont. I believe ST swaybars mount to your shock bolts some how so you dont need new LCAs.
Then you have the possible problem with subframe tear through and/or tear apart. But thats kinda another subject.