I have a alpha 1 gen 2 counter that broke a shaft.. Anybody know how the aftermarkets hold up, 3 yr no fault warranty ?

Run one of their lowers(essentially an alpha) on my 3 liter outboard, 2 years no problems.

I've heard all good things

I have their Bravo Lower on my Velocity 260 w/496 mag. I have almost 2 seasons and over 200 hours. So far not a single issue. Plus they have a no questions asked 3 year warranty. I was even told by one of their sales people (before I bought) if I leave the drive down and drag it up my boat ramp, they will still repair or replace it.

There prices arent bad as well

If memory serves me, I paid right around $950 shipped to my door for a Brand New Bravo (SEI Version). I ordered directly from SEI.

We run them tru our shop and have yet to have a problem. Prices are very affordable and yes they back there claimed warranty up!!! trim rams , alpha and b1's cant complain

The only negative I have heard is that the paint does not hold up.

Have sold about 20 Bravo lowers and had no complaints.
Great warranty if needed.

They're a local company to me, and I know a lot of follk who run their drives here. No problems. SEI is a very robust alternative to stock Merc stuff at a fraction of the cost.