I will add a different opinion than most....
It sounds like alot of people have never played in either TOH or RTOH (of which TOH is a part).
I have run the TOH several times in every edition of D&D and have played in it a couple of times.
Most of my comments revolve around TOH since I have not played the return.
The player should be scared, and so should the character since it should be a place of legend.
Something like "I heard that Bob the Mighty Barbarian and his 7 companions went searching for the tomb, and they were never heard from again......." repeated many times.
The DM can tone the adventure down, but if run as written (and as intended by being a tournament module) you can wipe the floor with any party of characters since it is designed to kill them.
I recently ran a conversion for a local convention with 8 characters of levels 12 - 16 and it ended up as a TPK both times within 2 to 3 hours.
The comments after the event were along the lines of .....
"We never had a chance"
"That was CRXX and we are only YY"
In todays "Balance" driven games players are not prepared for a session where they are outclassed and outgunned.
I have had conversations with the other DM's in our group and we consider the module appropriate for two things, either a one shot or a campaign ending event.
If you put it in the middle of a campaign then you would have to "Balance" it to keep from killing everyone.
It sounds like alot of people have never played in either TOH or RTOH (of which TOH is a part).
I have run the TOH several times in every edition of D&D and have played in it a couple of times.
Most of my comments revolve around TOH since I have not played the return.
The player should be scared, and so should the character since it should be a place of legend.
Something like "I heard that Bob the Mighty Barbarian and his 7 companions went searching for the tomb, and they were never heard from again......." repeated many times.

The DM can tone the adventure down, but if run as written (and as intended by being a tournament module) you can wipe the floor with any party of characters since it is designed to kill them.
I recently ran a conversion for a local convention with 8 characters of levels 12 - 16 and it ended up as a TPK both times within 2 to 3 hours.
The comments after the event were along the lines of .....
"We never had a chance"
"That was CRXX and we are only YY"
In todays "Balance" driven games players are not prepared for a session where they are outclassed and outgunned.
I have had conversations with the other DM's in our group and we consider the module appropriate for two things, either a one shot or a campaign ending event.
If you put it in the middle of a campaign then you would have to "Balance" it to keep from killing everyone.