I've never ran tbol, but was interested in it so I read up quite a bit on it. Sounds like the big three oral kickstarters for mass are,
1. Dbol
2. Adrol
3. Tbol
Dbol seems to be the most frequent, for obvious reasons. Adrol is another really popular one due to how potent it is supposed to be, but fewer run it because it is more harsh and sloppy. Then there is tbol. The reason I was interested in it is because it is supposed to be a good lean gainer. So for those people that are concerned about their waist size and cuts, it'll help you stay lean while bulking up. It's also more mild in terms of toxicity compared to adrol and dbol. Plus, I have yet to find one person crying about gyno after taking it. Only downside is obviously being more mild, you would be pretty hard pressed to find people claiming to have gained superhuman strength while on it and jumping up 20+lbs. Seems like everyone's log I read though had some pretty good results out of it though and I'm still pretty interested in trying it at a later date.