When used correctly, it works very well.
I have read many negative reviews, that seem to indicate user error: If your iron tips get pitted or chip from heat, it most often indicates that it's been left plugged in and heated for long periods of time. If you want them to last for many years, then I suggest use it for no more than about 10 minutes at a time before unplugging it to go do something else. Don't leave it heated in-between uses or when you go do another task.
If you use one of these and you get a lot of solder splatter on your pc boards, then you are likely not squeezing and holding the bulb BEFORE heating the solder that is to be removed.
If yours gets clogged, then you are not expelling the solder from it after each removal.
I have had none of those issues. It works perfectly, still looks new and not discolored after using to salvage over 6 rotary encoders, 8 stepper motors and 9 small transistors. The last time I had one of these, was when I purchased from a Radio Shack store while in college in 1991, and it lasted over 15 years with the original tip, before being lost in a move. I hope this one lasts as long or longer, and with proper usage and care, I have no reason to believe that it wouldn't.
As for convenience and comparison to other desoldering tools: While I was in college, I could salvage or remove nearly twice as many components as the majority of my classes who used the more common removal tools that required using a second hand to hold a soldering iron, and even the instructor switch to using this type of desoldering tool when he saw how quick and easily it worked.

















