"HBXL - bad experience with the …"

I have not had good experience with the software, it is basically buggy addon to excell (you will need windows computer and excel package to start with). Even if you done estimating for years don't expect this will make your life easier, I have given up somewhere along the steep learning curve having paid £1300 for it. If you struggle they will offer paid sessions, which may be just good money after bad investment

"Worked closely with HBXL for years"

Worked closely with HBXL for years, their key talent is knowing their target industry, we're swearey and rushed off our feet with cloven hooves when it comes to technology and they know how to work with you without overly complicating everything or patronising!