Hi Alex,
I bought an Aqua 50 from alltec 12 months ago and so far have had no reliability problems. The only nigles are the internal glue used to stick internal components to the inside of the machine isn't strong enough but this can be rectified...and the button covers drop off..but this can also be rectified...my wheel tred is looking rather worn out too....however these probs may well have been rectified since i bought mine...I've never had a call since the sale (which is dissapointing)...must be to busy with their fast track programs.
Over all Very happy with the equipment.
Kind Rgds Tony