Box builder software, what program do you like?

What software programs are guys using for enclosure design? There seems to be tons of downloads out there, even lots of free ones. However, I do worry about "free" downloads as I've had share ware problems in the past. Some of the things to consider are ease of use, flexiblity in type of enclosure, numbers of subs, etc.

Just wondering what people where using and why they like (or dislike) a program.

ask andrew he has a pretty good one.

winisd is a pretty good free one. it does sealed, ported, and 4th orders, i can do 6th orders but cant calculate and optimal response for it. but the response graph you get is how it would play in an open field, not a car. there may also be a better version than the one i have now.

it has a tone generator in it too.

I use bassbox pro 6 and in my opinion it is the best one out there, almost all the major car audio companies use this program. And the ones that don't use bassbox use leap. Also Todd at tc audio he uses bassbox pro 6 as well if you are familiar with who he is and what type builds he has done.

I get sort of nervous when it comes to downloading software, especially "free" software. I found a site to dowload bassbox 6, but wanted to see if anyone else was familiar with the site before I tried a download.

http://downloadsoftwarez.blogspot.com/2008/06/bassbox-v6-pro.html

I'm not going to try to download from this site unless one of you guys can tell me that you have downloaded from there safely.