If the computer really had 23 dives on it LP would have taken it back. Did he try to get a refund? In my years of experience with LP, I have never had any of this silliness happen. The rest of the complaints are his own fault or speculation. He should have done his homework.
LP is really only good for the experienced diver that knows what he/she wants and can't get it in another place easily or cheaper. This is the only way to view LP IMHO. Sometimes LP will save you 50% or more and that's when you should consider them. If they are only saving you 10% then rethink your purchase.
All that said, if Scuba Toys has what you want, no reason to buy from LP.
The good news is you both will have fun diving together! Happy diving!