Well, we began the "hard" way using an XL spreadsheet that had a two point entry system... one pointed and the other person typed.....arrrgh
We "evolved" into Wendes, which only took a couple of months to get used to...no real "training" involved, basic setup was easy, and then you guessed a lot.
We moved to TSI pretty much exclusively for the promise of Dline and the 3D aspects... bonused by the "realtime" changeonthefly estimation abilities. However, getting the earlier versions set up was/is daunting. And then my database corrupted.....but I caught the guys in Vegas, and they fixed it.