Oh, so we were almost neighbours Well, upgrade to suite depends on availability. It's not something you can get always. If you get it - nice, enjoy it like I did yesterday. If not - OK, probably 11213 is not so bad either If and when you definitely need a suite, simply pay for it, then it will be for sure. HGI FRA does offer Junior Suites (that's what I got), see their website. For example, right now Junior Suite for Feb.20-21 is available and costs 339 EUR a night.

For me yesterday's upgrade was the very first upgrade to suite in any Frankfurt Hilton family hotel during several years of stays. I enjoyed it very much but certainly I wouldn't count on such upgrade each time However now I know better what such Junior Suite is at HGI FRA, and it will help me to decide - maybe I will book such suite myself on some special occasion.