Rinkya is great, precisely because you do NOT 
have to depend on someone at the other end of the 
wire.  Everything is completely in your own 
hands, you bid on what you want, when you want 
to, and do not have to depend on anyone to handle 
your bid for you.

On YJP, I often win things away from competing 
Celga bidders, because Celga puts the bids in 6 - 
8 hours before the end of the auction, and I so I 
have Celga's bids in front of me when I tune my 
bidding in the last 30 minutes.

As someone pointed out, they are both too 
expensive.  And, to be fair, Rinkya is *more* too 
expensive than Celga.  So once has to choose 
between lower price and control.

Rinkya *is* slow in reading and servicing their e-
mail, especially on weekends, but normally this 
does not matter, because they are not a part of 
your bidding process.  The only time this should 
matter to you is if you are trying to increase 
your deposit so you can place a bigger bid, and 
this is something that you can plan days ahead 
for, and should not leave for the last minute.