I've had my MHG 8x30 for just over 3 years now. It is my most used binocular, but not the binocular I take on international trips nor on boats. However for almost all local birding and incidental birding while traveling (of which there tends to be a lot), it's the bin I take. I would guess, averaged out over the year, it get's used for several hours about twice a week. It's also my partner's favorite bin, by a big margin (combo of quality vs small size).
I still love mine and have had no problems with durability yet (touch wood). The focuser is still a bit stiffer than my other bins, as it was when I bought it, but still very smooth action.
I've had PRK (refractive eye surgery) this year so I'm no longer wearing glasses except non prescription sunglasses, which is lovely. The MHG is a bit fiddlier for eye placement without glasses as opposed to with, for me. Before with both my regular glasses and prescription sunglasses I had to press them up snugly to get the full FOV but it worked out very well for the small size. Now if I am sunglasses free the small eye cups sink too deep in my eye sockets, and I would have blackouts. So I have pretty easily learned to rest them just against my upper eyebrows and have adapted quickly and without too much problems. Not quite as easy as before, but not a deal breaker for me.
The glare performance is comparable to my Swaro (EL previously, NL now), and perhaps a hair worse than my SFs - again not a deal breaker, though not class leading.
I still definitely take the 10x42s (NLs now) or 8x42s (SFs) when I'm going on a "serious" birding trip as I want to use the best I have. But I spend a lot of time at my local patches and pedaling around on my bike with the 8x30 Monarch HG and am never disappointed and never wish that I'd brought a bigger/heavier/better binocular. At some point a mega raptor might fly over or there might be a rare duck or shorebird that I can't get closer to and I might just wish for the better bin... but 3 years in and it's not happened yet. The only thing I do notice from time to time is CA, but it isn't bad enough and doesn't bother me enough to justify carrying a heavier bin for local outings.
If the Swaro CL 8x30 or the Retrovid 7x35 were actually significantly better I would have swapped. If a better bin that is more or less as compact comes along I'll be happy to swap. But for now the combo of ergonomics, FOV, and optical quality can't be beaten for my use.