They seem to be pretty reliable, I have been looking at them for awhile...at the moment, its really the only option I have . I have read some negatives though, alot of them seem to stem from improper installation, not "dialing" in the flow , using bad tubing, or just bad maintenance....But, I have someone in my corner who has had great success with them and is willing to help me out to get it right. ::crossing fingers:::
