I haven't had problems with any of their FOs, but I only have a dozen or so. The majority of my FOs I had already become accustomed to from other places and don't change unless it's necessary. Some smell similar between suppliers but sometimes they're completely different. Lavender is one - Peaks is very herbal, Aztecs smells flowery and Alabaster is in between. Not to mention each one is subjective to the nose. You may smell something completely different than me, from the same bottle, then will smell different again once it's in wax. Cruise through the FO section for a better idea on scents. There's a scent review board as well, but I don't have the link handy. There are also many new "hot" FOs out there that I've never smelled because I've been out of it for a year or so. I can't comment on the container waxes as I don't mess with them very much. I'm a pillar gal As to what to look for when testing, there's a lot of info in the Newbie/FAQ sections. Somewhere was even a helpful test sheet to record information. How long should it take to smell it in a room? Depends on the size of the candle, room size, air temp, etc. More often then not, I can't smell anything after I've been pouring...lol