This study investigates the initial usability of the Safer Seat vehicle transfer aid. Participants with impaired mobility, strength, or balance are being asked to transfer onto and off of a vehicle seat with and without the device to trial its usability. In addition, transfers are doing rated by a licensed occupational therapist according to the Physical Mobility Scale to determine if independence level is affected. Usability evaluation is being done both qualitatively and quantitatively using Technology Assessment Surveys and a semi-structured interview. Insight gained through this initial trial will be used to refine the design of the Safer Seat.