Experience with Morgan's Mine of Thomas the Train

So the other day my son saw Thomas at Morgan's Mine and wanted to get it.  Of course, we didn't get it for him then, but we did put it in the back of our mind to possibly get it for him for his birthday or Christmas.

He has several different Thomas the Train toy train tracks that he enjoys playing with, and Morgan's Mine would just add on to the existing tracks.

However, after looking around online we saw that some people did not have much success with this addition to their Thomas the Tank Engine collection.  Several people thought it was too small for the price and was a waste of money.  It seems that the kids like it, but they are not the ones that had to pay for it.

Thomas the Train toys cost enough as it is, and if it is a good toy that my kid will play with, I don't always mind shelling out the money for it.  However, I'm not interested if the toy turns out to be small and cheap, and some people have cast Morgan's Mine as just that.

Do you have any experience with Morgan's Mine?  If so, what was that experience like.  It is worthwhile to buy, or should we look for other Thomas the Train gift ideas?