cheap powerheads

So I was wondering if any of you fellow reefers have had success with cheap powerheads that are available on amazon and other sites. Some are like 2 powerheads that are 1300 gph each and you can buy the set of 2 of them for around $24 which is a **** steal.



Like these:

http://ift.tt/1ncVBFX





or these:

http://ift.tt/1ncVBWj