I purchased a Deeper unit this spring. Haven't really had a chance to use it all that much yet, but it does everything as advertised. Pretty useful little unit. To me, the only drawback is that it quits functioning when the water is 3 or 4 feet deep. In a pond setting, that's a lot of water that you can't cover.

2011 five acre pond. LMB, SMB, HSB, SPB, BG, CNBG, HBG, RES, WM, CC, BCP, GC, FHM, GSH