Well, Bill's experience and ours represent a statistically REALLY tiny sample.
My first SH VHF, at somewhere around 8 or 10 years old, was only replaced after
the battery finally ran out after many years of good service, because at that time, a
NEW SH VHF was only sightly more expensive than the battery!
Our current HX300s (we have 2,) have been flawless for years, and have no knobs,
gasketed hinged door entry for charging, have great sonics, float, and flash red for easy
recovery when submerged. As always, YMMV.
The Connyak BBS