I had problems getting a prescription pump at first so tried the cheapies from Love Honey and then Amazon. I first got one with a squeezy pump but the actual pump was slow and soon split. Then I got one with the scissor or trigger/pistol type pump which has lasted ages. It also has a longer more flexible pipe. Now I have got a prescription Somarect as well. To sum up my opinion on the positives and negatives of each.
Somarect Positives:
Top quality pump unit
Excellent choice of rings
Slightly easier to apply the ring
Comes with inner sleeve if required
Good safety pressure relief valve
Instructions
Somarect Negatives:
Heavy (can't use it standing without holding it)
Not waterproof
Expensive or prescription only
Cheapy Positives:
Price and variety available
Waterproof so can use in bath or shower
All parts can be bought seperately as extras or variety
Lighter so can wear while standing if you get a good seal
Cheapy Negatives:
Some of the actual pump units are weak (The pistol type is fine).
Slightly more difficult to apply a ring, although just takes practice
Be careful that if the pressure relief fails that you are ready to just pull the pipe off
If I could only have one regardless of cost it would be the cheapy.
Cheapy:
I have found that if you pump up to full engorgement then remove the comfort seal I can wear a soft ring and then get the tube over the ring forming the seal and then pump with the ring already on.
Or if you are shaved or at least trimmed short, put the ring on the tube without the comfort seal and slip it off and onto penis before releasing the pressure
It all takes practice and a bit of trial and error.
Good luck
Cheers
Bill