I've been very pleased with the rider on my State Farm homeowner's policy.
I started it 3 year's ago to cover the 2 rifles that I last took to Africa. When the CZ .416 Rigby was safely back in the safe, I shifted $8,000 to insure my 37 year old Submariner.
Last fall, I did $1,800 worth of damage to the watch helping my daughter move during a thunderstorm. (Bad Day (I also tore up my pickup truck))
I sent the receipt to State Farm and $1,800 showed up in my bank account 3 days later, with no "pushback" whatsoever.
I've been a State Farm customer since I was 16, and within the last 5 years, they have become not as easy to deal with as they used to be, but the homeowner's rider to cover personal items has been 100% positive.