Not tried Insure4drones but imagine they would be ok.
I've just gone with DroneGuard having been with John Heath's Cover Drone for about 4 years. I've also decided to only take out £5 million public liability insurance. Nothing but praise for Coverdrone, very easy to deal with but DroneGuard came in with a substantially lower quote.
A slight risk but my inspire 1 is worth so little these days and the other drone, a Mavic 2 Pro, is a relatively inexpensive machine. I'm also a very cautious pilot and apart from one slightly rough landing have had no incidents in 4 years.
With the amount I've paid for insuring the Inspire 1over the years I could have bought a complete new machine.