Is it your first time? Sniffing it is the best in my opinion, and 30mg for your first time will get you pretty fucking high but it won't be too bad, if you're worried start with half and do the other half if you can, and it lasts a decent amount of hours man (probably about 8 hours, not of being high but not being "sober" or able to sleep for sure),if you do it at night its pretty rare you'll get to sleep without some help from something else..
Hope this helps
Always the one recommending plugging....
Bioavailability is extremely high if you crush up the XR beads, dissolve them in water and plug it. Onset within 15 minutes, slightly shorter duration of effects which can be a bad or good thing. In between nasal and oral.
A lot of people are against it but it's my preferred ROA for just about everything that is worth plugging.
If you do use plugging as your ROA, dose a little lower. 10mgs or so.