I am using this company for the first time, in a couple of weeks time.

I have used other companies in the past, without any problems.

They are asking for a voucher, but I only have a ref. number,
other companies have never asked for any paperwork!

Also as I am travelling alone , I am using a shared shuttle for the first time,
has anyone any experience of this.

You should be very careful as some of these shuttles are actually run by inter galactic beings carefully constructed to look like humans, their mission is to take you off to their spacecraft for scientific experiments.

Seriously though some companies operate using a pre paid voucher others you pay on arrival - you should try and relax and enjoy your holiday

Just email them and ask them to email your voucher to you. Then you can stop worrying.

I've used them a few times including mid July this year and I am using them again at the end of August.
So far a faultless service. I think the voucher is a copy of their email to you with the numbers on.

We have nothing negative about them from any we know who has used them.

Most have taken the private transfer ( door to door ) option rather than shared with multiple drop offs.

Many thanks!

You print 2 copies of the email they said you, hand one over on arrival and keep one for the driver on the way home. I have travelled alone on the transfer with the driver and shared with other people. No problems up to you if you want to chat