So far my bent glass stem has fallen on the floor no less than a dozen times. Keep it wrapped up in something for protection when you're not using it and it'll be totally fine.
When I first started using the SOLO I broke so many stems.
I started out using the bent stems (The first 10)
The straight stems I keep in the TRAVEL TUBES for protection as "EXIT" mentioned.
Padding your floor were you vaporize is essential as well.
I'm a cheap tight wad and hate to keep buying stems.
Since I'm a flavor chaser this is my solution to preserving glass.
http://www.planetvape.ca/vaporizer-accessories/storage/travel-tubes.html
I like 5 and 6 but I go after higher temps always for higher release of CBD (more useful for pain relief). Generally I like to do a couple bowls on 6, and then turn it down after that for better flavor.
I set mine at level 4.
When I reach level 2 I start drawing.
So at 2 I get a couple of Low Temperature rips.
Then when it reaches level 3 a couple more at that Temperature.
Level 4 is were my actual session normally starts.
Lately WATER PATH or DRY (Glass Stock Straight Stem with a CHILLIN Tip) on level 4.
This is "DREAMERS"!
I tried level 5 however it was to much for me.
Some people like higher setting levels as we all have different needs.