I have 196k supercharged miles on my '99 V6, and have loved every mile. The power is great - don't let anyone convince you otherwise.

The only problem that I can see, to be honest, is that our older Tacos are racking up the miles and aren't as bulletproof as they were 5 or 6 years ago. I'd maaaaaybe be a little concerned about longevity if you added one to a Tacoma with over 150k miles...
Just my opinion though! Otherwise, I'm veeeerrrryyyy happy with mine! Search around and you'll find TONS of info and forum discussions here!

'99 Tacoma Xtra cab V6 TRD
TRD Supercharged, URD 7th injector and 2.2" pulley, 32X11.5 BFG All-Terrains, OME 881 3-inch lift/Toytec AAL, 5100 Series Bilsteins all around, and ProComp 130 lights.
No I'm not some creepy naked guy...