Bundles on GOG, for a long time now, have not been of any benefit to consumers. You're required to buy multiple games here for the same discount you would get on them individually from other stores.
I disagree. First, bundles are good for collectors like me. We can discuss about how bundles are done lately, how well they they are themed. I like bundles, especially with a special theme, as it allows me to get interesting games of a genre (Strategy bundle), an era (Bullfrog bundle) or a series (Railroad Tycoon) cheaper. At the moment there are many big publisher bundles around, which isn't also bad, but a little more variety with some smaller and better themed bundles would be better.
About the discounts for a single game, I also need to disagree. I use isthereanydeal.com to compare prices and to organize my waitlist. The regular discounts of the games are very competitive, very close to steam and sometimes even better. Not for every game, of course, but for most.
What I really dislike at the moment is the layout. It's messy and confusing. it would be helpful if gog would split the bundles in subgroups, one for publishers, one for the youtubers and one for themed ones like genres. Also to use tiles was fine in the past, but the enormous number of games on sale it's hard to browse. Exactly for that reason I stopped browsing the webpage for deals and instead use isthereanydeal.com to track only the games I'm interested in. I just check the website for the bundles.