It really depends on the work you are doing. I have used AccuBid, ConEst, Estimation, and Vison. Of those four, the only one that is made specifically for electrical is ConEst. The others are also doing mechanical and plumbing which come with their own ways of doing things. If you are doing just residential, Vision or Turbobid may fit the bill. If you are doing more than that I would look at something else. If I were purchasing and getting set to spend a couple of grand I would get several demonstrations and see what I liked best. Then get a second demo. Also, you can get a couple of programs for a lot less but they are not very good. You wouldn't buy your screwdriver from the discount store..you buy the best you can and something specific to the trade (for me it's Klein or Ideal).