I'll be honest I have wanted to use one but in pvp I didn't like them that much. And even in pve they looked kinda meh. Bubble is great and all for teams. But when you can self res and save yourself or go for the nearest enemy hit them and go invis a bubble becomes kinds useless except to other Titans. They need a buff in both pve and pvp and I am hoping that sunbreakers will be useful in the next dlc.