It all depends on how busy the workshop is and how reliable it is as well. If workshop busy, you also need to wait very long.
For me, I go back to BM to prevent having more repercussions if something suddenly arises, like what happened to my friend's old Mazda 5 (engine light keep appearing, engine keep stalling even after more than 5 visits to outside workshop and spending more than $1k to change this and that).
Yes, BM is expensive like all ADs without doubts.
I've never serviced after my FOC 10K (which doesn't include EO) with BM. That was after 1 year. Before 2nd year up, I went back to claim a new battery (2 years warranty), there was no issue.
I took it out from 20K-110K. At least when I make a booking at Autosaver, they allocate the slot to me and I can wait in their lounge until they are ready.
If something really arises, you'll be surprised you need more than 10 visits and 10K worth of repairs before they actually know what's wrong.
If you believe the only experts are the ADs staff, you'll be surprised to know most of them know sh!t.
It's fine to be expensive, but if they can deliver, I don't mind going back to BM. Issue is, they can't deliver, slow and once they drained my coolant and actually it was almost empty. I was wondering why my car engine bay was feeling weird, I emptied a 1.25L bottle of water in easily.
Getting spare parts was also an issue because despite their magazines sent, saying they have strong inventory, etc... they can't even provide a grommet when I lost mine. That little plastic part that is at the end of the bonnet support. They told me need 1 month to indent it. I raised my eye, and in 5minutes they manage to produce one. Seriously? (Sin Ming branch as I stay 2 bus stops away).
BM's servicing/warranty model is based on 'you never need to walk in for service/warranty'. The warranty claims and servicing Q is the same. So if you are in dire need of help, you end up in the queue and pushed so far back because everybody who is doing servicing made reservations already. I waited up to 2 hours to get served. Wrote in and ask why there's no Q for warranty/service, got 0 reply.
My steering has knocking sound when turning (known issue) but they say it's not acknowledged officially, so they can't do anything - ?????? I had to go through my SE's 'backdoor' to a senior mech to know this because Sin Ming branch says the steering is 'within spec'.
That said, the SOP and SoW for BM is very straightforward, they are not there for you when you need, they are just there to earn as much as they can from servicing and selling you snake oils along the way - if you are not careful.
I'll take everything with a pinch of salt especially when the SE tells you do this can get A B C D E... Z, AA, AB....