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Things Remembered. Hope this helps!
I've ordered many things from them and am always completely satisfied.
I used to work there, both as management and as the store's master engraver.
You can in fact get a custom design, provided the store doesn't have the necessary Chinese character(s) on hand. It won't be cheap though. It will be treated as a custom logo, the cost for this is $50. However, if you buy at least $50 worth of merchandise, they should waive that fee.
That being said, you'll have to bring in a drawing/printout/whatever of what you want. It will get sent off to TR headquarters and in about 2 weeks your local store will get a disk back containing your brand new logo. the good news is that if you ever want to use that design again, they'll have it on hand and only normal engraving rates will apply (when I was there it was $3/word, $6/design, $6 minimum).
This next part I can't stress enough, mainly because the percentage of customers who would actually listen to me about this was in the single digits. The designs are scaled to fit the piece being engraved. If you end up having a lot of detail, get something with a fairly large engraving area. If it's small it will NOT show up well.
If they don't have what you're looking for in-house (I really don't recommend 95% of their merchandise as it's mostly made-in-China garbage), you can always bring in something you bought elsewhere. Keep it under $300 or they won't touch it - if they screw it up they're responsible for replacing it. It costs extra to bring in something ($10 over the cost of the engraving if the value is under $100).
If you have any questions, don't just ask the salesperson. If possible, speak to the person who is actually going to do the work. If they work order is filled out correctly, it will have the ID of the person who wrote the order and the ID of the person who performed the work.
Hope this helps.