Regarding the feasibility of AMSTAR, the time needed to complete scoring showed this new tool is feasible in assessing quality of TCM systematic reviews too; it took about 13 minutes on average to complete an assessment and showed well applicability. The statistical analysis revealed that the AMSTAR was slightly more time consuming in contrast to OQAQ; there may be several explanations for this. First, the AMSTAR has 11 items, longer than the 10 items in OQAQ; second, the AMSTAR was developed based on two instruments, including OQAQ itself, so items in the instruments may be overlapped, and it would take less time to complete scoring when filling replicated items; third, the sequence of applying tools may be another explanation, as we conducted the assessment in the order of first AMSTAR and then OQAQ, assessors need more time to look through a systematic review to facilitate it in the first round of assessment by using AMSTAR, while in the second round by applying OQAQ, such time would be saved.