I hated my Samsung Fascinate.
Hated it.
The touch screen was not very sensitive. A bit annoying to press and use the keyboard because you had to press a bit hard. It varied with heat.
The touch buttons on the bottom were worse. Then when the phone would get hot, the touch buttons would start self activating and the back-light would blink.
When using it in the car on charge, the phone could use more power then any charger could supply. So with the display turned up, the battery would slowly die, even on a high rate charger.
All the while doing this, the phone would get hotter and hotter. The touch buttons would go spastic. The phone would shut the charge down. Then the phone would turn off.
Of course, that was all assuming you could ever get the GPS to work in the first place, which was a real challenge.
And the loudspeaker, a cruel joke to say the least. And you know the charge and notification LED. THERE IS NONE. Are you serious!
All of this in a petite cabinet that felt like a fragile cracker that I was going to break any minute.
Verizon and Samsung confirmed that all of this was 'normal'.
My previous HTC WinMo phone never had any issues like this. My Thunderbolt is nearly flawless. Well, there is that peeling kickstand. What a total failure.