Stumbled across this whilst looking up directions to Jamesons Distillery (which it is only a short walk away from), but ended up being the best thing we did during our couple of days in Dublin.
We noted down the tour times and arrived around 2:30pm on the day. Sign on the door said tour in progress, be about 20 mins but we luckily only waited for about 5, from what I have heard elsewhere you are fortunate to catch this so ringing ahead is usually advised.
As a whole, the church itself is fairly ordinary from a visual aesthetic (though it’s longstanding history impressive), but it’s main attraction, it’s crypts, was a truly unique experience.
Probably not recommended for anyone with significant mobility issues or claustrophobia, but the crypts themselves and their contents were fascinating.
The tour guide himself was also excellent, welcoming to all the guests in our group but also delivering the tour with a fittingly slightly off-kilter approach that added to the experience without seeming too gimmicky.
€7 for the tour, but absolutely worth it. Not like anything else we’ve seen in Dublin, highly recommended.