Used Touchdown for number of holidays this year. Dubai, Portugal, Mauritius and had no problems. The DXB (Jan), FAO (Easter) holidays were hotel only booking, and MRU (Begining of June Bank holiday) was the full job. They do confirm around the 14 day mark before departure and I had no problems.
As for Airperx. I have not used them, but I have checked out their site and I am registered with them. The detail you provide includes your employer and the password as such is sent via your employer as with any brochures they send you.
Airperx do have some good offers. But they go. Confirmed flights LON-MIA with BA or VS £174 plus tax £234.80 rtn. However, a lot of flights they use are not direct so watch for that. The other thing I noticed with a DXB holiday for some very low price. The flights were via Sofia ex Balkan.
They are not always cheap either. They are part of the OTC group, which run holiday web sites for travel agents, Thomas Cook etc as well as general public. Checking out the hotel only deals between the 2 sites shows a difference of only £3-4 per night. See Expedia as well.
Oh yeah and Interlinebookers.com
crewstart.com has a section of Interline companies as well.
Have fun where ever you go
