We've been using Skytrac to track our offsore fleet (225,92,C++) for 4 years. The system works very well and their team in Canada are very helpful. We've had issues at times with the web based tracking system but issues generally get resolved in 24 hours. We also have it hooked to the new 40 Square "Heli Office" software so it gives us billing information, FD times based on WOW as well. pm me if you want more info.