I don't mind much. It has higher stats compared to normal cash equipment. The game is Free-To-Play so it's just an option to the player. The company needs some sort of way to fund for their free server, so I can't really bash on them -- unless they really rig the chances.
If you think about it, a high Lv 70-ish set, cloak, weapon, and Lv 57 accessories would cost around $40 anyways. What we're paying for a Lv 70 Uber Boost-On-Stat Equipment would be worth almost double, but with a chance that we could get it for less. It's all luck.