Since there is no formal place to review these people, I'm throwing this one out on the forum.
I bought a voucher through Amazon local for transportation to DCA. The website form isn't functional so I emailed my dates. Mr. Tahir (the owner?) tried to charge me an additional $10.00 each way to go to DC during midday hours. This was not stated as a condition of the $125.00 voucher and I pointed that out. Mr. Tahir said he would honor the voucher and to contact him 2 weeks prior to departure. Today, two weeks prior to my departure I e-mail to confirm and I get the following message:
sorry we don't honor amazon voucher no more, amazon should refund your money long time ago, please call local amazon for refund, we apologize for inconvenience , best regards
Luckily, Amazon Local did promise a refund. I bet anything Enterprise Limo Service over promised on these vouchers and found it to be a loser and thus decided to not honor them any longer.
I find this business to be dishonest and unreliable and I will make a point of not recommending them to anyone who asks for advice regarding airport transportation.