The taxis on the island are in a very poor state of repair.  Broken windscreens are common.  Worn or broken suspension is almost compulsory.  Seatbelts often are inaccesible or not working.  The standard of driving is low but speeds are generally quite less and there is not much traffic so serious accidents are probably less.  Be aware that they do no use meters so you should know the amount to pay before you travel and have it ready with the correct change.