Cleared my plab 1 exam with 133. I prepared using the Oxford handbook of clinical medicine as well as plabable. I studied for 2 and a half months.
However coming out of that exam I didn’t feel very confident. So my suggestion would be to study from the start and to first go through Oxford handbooks medicine and surgery and then use plabable and passmedicine for the best preparation possible. Plabable is a must. 1700 is a waste of time as it is just the same questions as plabable with wrong marking and no explanation.