I found some at a local shop and I've never tried any of them and was hoping to hear from those who have.
What cartridges do they seem better suited to and how do they compare with IMR, Hodgon and the likes.
rookie

I am a big Vihta Vuori powder fan, that said I wont ever use the 5 Series powder's again. they are a double base powder but are really rough on barrels more so than other double base powders. The 1 Series powders are awesome but not as popular as most powders just because they are normally more expensive. The N150 you mention is in a burn rate close to H414/W760 and the various 4350's.
I use it in 22-250's but it has quite a wide range of application

Thanks boatanchor, appreciate your input.
I've tried to contact vihtavuori to ask about some specific load data for cartridges not listed on their website but so far no luck.
rookie

I've used both the 1 series and the 5 series, and one of the slower pistol powders. 3N37. I like them. I had a temperature problems developing loads in California heat for hunting in Montana and Wyoming in winter, and decided to try the 5 series in 338 Win Mag and 338 Jamison, and N140 in 7-08. I found that N1 series was as stable temperature-wise as the N5 series. I like the powders, their biggest negative being price and availability.