Yes I use the SPC storm reports, but here is another caveat that must be kept in mind if using it for research purposes.
The timestamps on the SPC reports must be taken with a grain of salt. Usually the LSRs are timestamped as to when the report is received by the specific NWS office, as opposed to when it actually occurred in most cases. This is why it should be stressed that spotters note the time of the severe weather occurrence, because in many instances when there is active severe weather and it is difficult to get thru to the local NWS office, there is a delay in the relay of the report. Hopefully an NWS employee can give us their estimate of the accuracy of the storm report timestamps, but there have been published papers that note an alarmingly high amount of LSRs may be off by as much as 10-15 minutes.